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With over 500 online simulations, virtual labs, and interactive cases for math and science—there’s a Gizmo for just about everybody. Let’s find yours.
Surface and Lateral Areas of Pyramids and Cones
5 Minute Preview
Vary the dimensions of a pyramid or cone and investigate how the surface area changes. Use the dynamic net of the solid to compute the lateral area and the surface area of the solid.
Lesson Info Launch GizmoSurface and Lateral Areas of Prisms and Cylinders
5 Minute Preview
Vary the dimensions of a prism or cylinder and investigate how the surface area changes. Use the dynamic net of the solid to compute the lateral area and the surface area of the solid.
Lesson Info Launch GizmoMeasuring Volume
5 Minute Preview
Measure the volume of liquids and solids using beakers, graduated cylinders, overflow cups, and rulers. Water can be poured from one container to another and objects can be added to...
Lesson Info Launch GizmoBalancing Blocks (Volume)
5 Minute Preview
This Gizmo provides you with two challenges. First, use blocks to build a figure with a given volume. Then, try to balance the blocks on a platform that sits on the tip of a cone. The...
Lesson Info Launch GizmoArea of Parallelograms
5 Minute Preview
Examine and manipulate a parallelogram and find its area. Explore the relationship between the area of a parallelogram and the area of a rectangle using an animation.
Lesson Info Launch GizmoArea of Triangles
5 Minute Preview
Use a dynamic triangle to explore the area of a triangle. With the help of an animation, see that any triangle is always half of a parallelogram (with the same base and height). Likewise, a...
Lesson Info Launch GizmoHearing: Frequency and Volume
5 Minute Preview
Test your hearing range by listening to low-, medium-, and high-frequency sounds. Compare the relative loudness of sounds at each frequency to create an equal-loudness curve. In a quiet...
Lesson Info Launch GizmoCircumference and Area of Circles
5 Minute Preview
Resize a circle and compare its radius, circumference, and area.
Lesson Info Launch GizmoPerimeter and Area of Rectangles
5 Minute Preview
Discover how to find the perimeter and area of a rectangle, and of a square (which is really just a special case of a rectangle).
Lesson Info Launch GizmoPyramids and Cones
5 Minute Preview
Vary the height and base-edge or radius length of a pyramid or cone and examine how its three-dimensional representation changes. Determine the area of the base and the volume of the...
Lesson Info Launch GizmoPrisms and Cylinders
5 Minute Preview
Vary the height and base-edge or radius length of a prism or cylinder and examine how its three-dimensional representation changes. Determine the area of the base and the volume of the...
Lesson Info Launch GizmoMultiplying Decimals (Area Model)
5 Minute Preview
Model the product of two decimals by finding the area of a rectangle. Estimate the area of the rectangle first. Then break the rectangle into several pieces and find the area of each piece...
Lesson Info Launch GizmoFinding Factors with Area Models
5 Minute Preview
Find factors of a number using an area model. Reshape the area rectangle to see different factorizations of the number. Find the prime factorization using a factor tree.
Lesson Info Launch GizmoModeling Fractions (Area Models)
- Free!
FREE with no time limit!
5 Minute Preview
Model and compare fractions using area models. Set the denominators with the arrow buttons, and then set the numerators with the arrow buttons or by clicking in the models. Compare...
Lesson Info Launch GizmoPerimeters and Areas of Similar Figures
5 Minute Preview
Manipulate two similar figures and vary the scale factor to see what changes are possible under similarity. Explore how the perimeters and areas of two similar figures compare.
Lesson Info Launch GizmoModeling Decimals (Area and Grid Models)
5 Minute Preview
Model and compare decimals using area models. Set the number of sections in each model to 1, 10, or 100, and then click in the models to shade sections. Compare decimals visually and on a...
Lesson Info Launch GizmoFido's Flower Bed (Perimeter and Area)
5 Minute Preview
Construct models of gardens on a grid using squares of sod. Fence the gardens to find and compare perimeters. Work with pre-built gardens made of 36 squares each to compare perimeters of...
Lesson Info Launch GizmoChocomatic (Multiplication, Arrays, and Area)
- Free!
FREE with no time limit!
5 Minute Preview
Use the Chocomatic to design candy bars made out of chocolate squares. Use multiplication to find the number of squares in each chocolate bar. Build collections of chocolate bars that all...
Lesson Info Launch GizmoFraction, Decimal, Percent (Area and Grid Models)
5 Minute Preview
Model and compare fractions, decimals, and percents using area models. Each area model can have 10 or 100 sections and can be set to display a fraction, decimal, or percent. Click inside...
Lesson Info Launch GizmoCollision Theory
- Free!
FREE with no time limit!
5 Minute Preview
Observe a chemical reaction with and without a catalyst. Determine the effects of concentration, temperature, surface area, and catalysts on reaction rates. Reactant and product...
Lesson Info Launch GizmoFraction Artist 2 (Area Models of Fractions)
5 Minute Preview
Extend understanding of fractions by making modern paintings in the style of Piet Mondrian. Create and analyze paintings with different-sized sections. Compare the sizes of unit fractions....
Lesson Info Launch GizmoFraction Artist 1 (Area Models of Fractions)
5 Minute Preview
Develop understanding of fractions by making modern paintings. Find different ways to divide a canvas into equal-sized sections. Make paintings to represent simple fractions and to find...
Lesson Info Launch GizmoDensity
5 Minute Preview
Measure the mass and volume of a variety of objects, then place them into a beaker of liquid to see if they float or sink. Learn to predict whether objects will float or sink in water based...
Lesson Info Launch GizmoDensity Laboratory
5 Minute Preview
With a scale to measure mass, a graduated cylinder to measure volume, and a large beaker of liquid to observe flotation, the relationship between mass, volume, density, and flotation can be...
Lesson Info Launch GizmoMultiplying Fractions
5 Minute Preview
Multiply two fractions using an area model. Vary the vertical area to change one fraction and vary the horizontal area to change the other. Then examine the intersection of the areas to...
Lesson Info Launch GizmoSound Off, Please!: Designing Solutions to Reduce Noise Pollution
- Stem Case
As an acoustic engineer, students will work with an urban planner to learn how noise pollution impacts a community. Students will develop a system model to test design solutions. Wave...
Lesson InfoMultiplying with Decimals
5 Minute Preview
Multiply two decimals using a dynamic area model. On a grid, shade the region with width equal to one of the decimals and height equal to the other decimal and find the area of the region.
Lesson Info Launch GizmoAddition of Polynomials
5 Minute Preview
Add polynomials using an area model. Use step-by-step feedback to diagnose any mistakes.
Lesson Info Launch GizmoModeling the Factorization of x2+bx+c
5 Minute Preview
Factor a polynomial with a leading coefficient equal to 1 using an area model. Use step-by-step feedback to diagnose any mistakes.
Lesson Info Launch GizmoSticky Molecules
- New!
5 Minute Preview
Learn about molecular polarity and how polarity gives rise to intermolecular forces. Measure four macroscopic properties of liquids (cohesion, adhesion, surface tension, and capillary...
Lesson Info Launch GizmoPercents, Fractions, and Decimals
5 Minute Preview
Compare a quantity represented by an area with its percent, fraction, and decimal forms.
Lesson Info Launch GizmoPart-to-part and Part-to-whole Ratios
5 Minute Preview
Compare a ratio represented by an area with its percent, fraction, and decimal forms.
Lesson Info Launch GizmoSquare Roots
5 Minute Preview
Explore the meaning of square roots using an area model. Use the side length of a square to find the square root of a decimal number or a whole number.
Lesson Info Launch GizmoModeling the Factorization of ax2+bx+c
5 Minute Preview
Factor a polynomial with a leading coefficient greater than 1 using an area model. Use step-by-step feedback to diagnose any mistakes.
Lesson Info Launch GizmoPhases of Water
5 Minute Preview
Heat or cool a container of water and observe the phase changes that take place. Use a magnifying glass to observe water molecules as a solid, liquid, or gas. Compare the volumes of the...
Lesson Info Launch GizmoBoyle's Law and Charles's Law
5 Minute Preview
Investigate the properties of an ideal gas by performing experiments in which the temperature is held constant (Boyle's Law), and others in which the pressure remains fixed (Charles's Law)....
Lesson Info Launch GizmoIdeal Gas Law
- New!
5 Minute Preview
Explore relationships between amount, temperature, pressure, and volume for an ideal gas in a chamber with a moveable piston. Discover rules of proportionality contained in Boyle's law,...
Lesson Info Launch GizmoGeometric Probability
5 Minute Preview
Randomly throw darts at a target and see what percent are "hits." Vary the size of the target and repeat the experiment. Study the relationship between the area of the target and the...
Lesson Info Launch GizmoSums and Differences with Decimals
5 Minute Preview
Find the sum or difference of two decimal numbers using area models. Find the decimals and their sum or difference on a number line.
Lesson Info Launch GizmoForce and Fan Carts
5 Minute Preview
Explore the laws of motion using a simple fan cart. Use the buttons to select the speed of the fan and the surface, and press Play to begin. You can drag up to three objects onto the fan...
Lesson Info Launch GizmoRiemann Sum
5 Minute Preview
Approximate the area under a curve in an interval using rectangles. Compare the results of left-hand summation to the results of right-hand summation. Vary the interval and the number of...
Lesson Info Launch GizmoOrdering Percents, Fractions, and Decimals Greater Than 1
5 Minute Preview
Compare and order numbers greater than 1 using area grids and a number line. Examine the numbers represented as percents, improper fractions, and decimals.
Lesson Info Launch GizmoUnit Conversions
5 Minute Preview
Use unit conversion tiles to convert from one unit to another. Tiles can be flipped to cancel units. Convert between metric units or between metric and U.S. customary units. Solve distance,...
Lesson Info Launch GizmoDividing Fractions
5 Minute Preview
Divide fractions using area models. Adjust the numerators and denominators of the divisor and dividend and see how the area model and calculation change.
Lesson Info Launch GizmoDensity via Comparison
5 Minute Preview
Using four beakers of liquids with known densities, estimate the density of a variety of objects. Place each object into each beaker to see whether it sinks or floats, and then use this...
Lesson Info Launch GizmoOrdering and Approximating Square Roots
5 Minute Preview
Order square roots on a number line. Approximate the square roots using the side lengths of square regions in a grid.
Lesson Info Launch GizmoStoichiometry
5 Minute Preview
Solve problems in chemistry using dimensional analysis. Select appropriate tiles so that units in the question are converted into units of the answer. Tiles can be flipped, and answers...
Lesson Info Launch GizmoOsmosis
5 Minute Preview
Adjust the concentration of a solute on either side of a membrane in a cell and observe the system as it adjusts to the conditions through osmosis. The initial concentration of the solute...
Lesson Info Launch GizmoCoriolis Effect
- New!
5 Minute Preview
The Coriolis effect causes winds to be deflected as they move across Earth's surface, resulting in circular patterns of winds. This effect is caused by two factors, Earth's rotation and...
Lesson Info Launch GizmoPercents and Proportions
5 Minute Preview
Find a part from the percent and whole, a percent from the part and whole, or a whole from the part and percent using a graphic model.
Lesson Info Launch GizmoWeathering
5 Minute Preview
Weathering is the breakdown of rock at Earth's surface through physical or chemical means. Students will learn about the different types of mechanical and chemical weathering, then use a...
Lesson Info Launch GizmoNatural Selection
5 Minute Preview
You are a bird hunting moths (both dark and light) that live on trees. As you capture the moths most easily visible against the tree surface, the moth populations change, illustrating the...
Lesson Info Launch GizmoPhotoelectric Effect
5 Minute Preview
Shoot a beam of light at a metal plate in a virtual lab and observe the effect on surface electrons. The type of metal as well as the wavelength and amount of light can be adjusted. An...
Lesson Info Launch GizmoCenter of Mass
5 Minute Preview
Drag blocks onto a two-dimensional surface and observe the effects on the center of mass. Use a grid to calculate the coordinates of the center of mass. Investigate predefined shapes or...
Lesson Info Launch GizmoDiffusion
- Stem Case
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash.
Lesson InfoEstimating Sums and Differences
5 Minute Preview
Estimate the sum or difference of two fractions using area models. Compare estimates to exact sums and differences.
Lesson Info Launch GizmoEquilibrium and Concentration
5 Minute Preview
Observe how reactants and products interact in reversible reactions. The initial amount of each substance can be manipulated, as well as the pressure on the chamber. The amounts,...
Lesson Info Launch GizmoEquilibrium and Pressure
5 Minute Preview
Observe how reactants and products interact in reversible reactions. The amounts of each substance can be manipulated, as well as the pressure on the chamber. This lesson focuses on partial...
Lesson Info Launch GizmoConduction and Convection
5 Minute Preview
Two flasks hold colored water, one yellow and the other blue. Set the starting temperature of each flask, choose a type of material to connect the flasks, and see how quickly the flasks...
Lesson Info Launch GizmoPythagorean Theorem
5 Minute Preview
Explore the Pythagorean Theorem using a dynamic right triangle. Examine a visual, geometric application of the Pythagorean Theorem, using the areas of squares on the sides of the triangle.
Lesson Info Launch GizmoDensity Experiment: Slice and Dice
5 Minute Preview
Drop a chunk of material in a beaker of water and observe whether it sinks or floats. Cut the chunk into smaller pieces of any size, and observe what happens as they are dropped in the...
Lesson Info Launch GizmoPhase Changes
5 Minute Preview
Explore the relationship between molecular motion, temperature, and phase changes. Compare the molecular structure of solids, liquids, and gases. Graph temperature changes as ice is melted...
Lesson Info Launch GizmoProgrammable Rover
- New!
5 Minute Preview
In this introduction to coding, program a rover to explore the surface of Mars. Start by using tiles to create simple programs involving moving forward or backward, turns, jumps, loops, and...
Lesson Info Launch GizmoRelative Humidity
5 Minute Preview
Measure the temperature on wet and dry bulb thermometers to determine relative humidity. Measure the dew point by cooling a bucket of water until condensation forms on the surface. See how...
Lesson Info Launch GizmoRock Cycle
5 Minute Preview
Play the role of a piece of rock moving through the rock cycle. Select a starting location and follow many possible paths throughout the cycle. Learn how rocks are formed, weathered,...
Lesson Info Launch Gizmo3D Eclipse
- Free!
FREE with no time limit!
5 Minute Preview
Observe the motions of the Earth, Moon and Sun in three dimensions to investigate the causes and frequency of eclipses. Observe Earth's shadow crossing the Moon during a lunar eclipse, and...
Lesson Info Launch GizmoCritter Count (Modeling Multiplication)
5 Minute Preview
Use groups of critters on leaves to model multiplication as repeated addition. Change the expression to change the number of groups or the number of critters per group. Display the...
Lesson Info Launch GizmoMineral Identification
5 Minute Preview
Observe and measure the properties of a mineral sample, and then use a key to identify the mineral. Students can observe the color, luster, shape, density, hardness, streak, and reaction to...
Lesson Info Launch GizmoDye Elimination
5 Minute Preview
When a foreign substance such as a drug is ingested, it often remains in the bloodstream for a long time. This Gizmo models the elimination of substances from the bloodstream using water...
Lesson Info Launch GizmoModeling Whole Numbers and Decimals (Base-10 Blocks)
5 Minute Preview
Model numbers with base-10 blocks. Drag flats, rods, and individual cubes onto a mat to model a number. Blocks can be exchanged from one area of the mat to the other. Four sets of blocks...
Lesson Info Launch GizmoAdding Whole Numbers and Decimals (Base-10 Blocks)
- Free!
FREE with no time limit!
5 Minute Preview
Use base-10 blocks to model two numbers. Then combine the blocks to model the sum. Blocks of equal value can be exchanged from one area of the mat to the other to help understand carrying...
Lesson Info Launch GizmoConvection Cells
- New!
5 Minute Preview
Explore the causes of convection by heating liquid and observing the resulting motion. The location and intensity of the heat source (or sources) can be varied, as well as the viscosity of...
Lesson Info Launch GizmoHuman Evolution - Skull Analysis
5 Minute Preview
Compare the skulls of a variety of significant human ancestors, or hominids. Use available tools to measure lengths, areas, and angles of important features. Each skull can be viewed from...
Lesson Info Launch GizmoBeat the Heat: Tackling Urban Heat Islands Using the Science of Energy
- Stem Case
Lake City's latest heat wave has more people in the hospital than ever before. Juan, a local student admitted to the hospital, lives in one of the hottest neighborhoods in the city....
Lesson InfoSubtractive Colors
5 Minute Preview
Move spots of yellow, cyan, and magenta pigment on a white surface. As the colors overlap, other colors can be seen due to color subtraction. The color of most things you see--such as cars,...
Lesson Info Launch GizmoOrbital Motion - Kepler's Laws
5 Minute Preview
Learn Kepler's three laws of planetary motion by examining the orbit of a planet around a star. The initial position, velocity, and mass of the planet can be varied as well as the mass of...
Lesson Info Launch GizmoWater Crisis
- Stem Case
There has been an outbreak of legionnaires’ disease in a small town. This disease is caused by legionella bacteria that proliferate in contaminated water supplies. Students take on the...
Lesson InfoModeling Fractions (Area Models)
- Free!
FREE with no time limit!
5 Minute Preview
Model and compare fractions using area models. Set the denominators with the arrow buttons, and then set the numerators with the arrow buttons or by clicking in the models. Compare...
Lesson Info Launch GizmoChocomatic (Multiplication, Arrays, and Area)
- Free!
FREE with no time limit!
5 Minute Preview
Use the Chocomatic to design candy bars made out of chocolate squares. Use multiplication to find the number of squares in each chocolate bar. Build collections of chocolate bars that all...
Lesson Info Launch GizmoAdding Whole Numbers and Decimals (Base-10 Blocks)
- Free!
FREE with no time limit!
5 Minute Preview
Use base-10 blocks to model two numbers. Then combine the blocks to model the sum. Blocks of equal value can be exchanged from one area of the mat to the other to help understand carrying...
Lesson Info Launch GizmoCollision Theory
- Free!
FREE with no time limit!
5 Minute Preview
Observe a chemical reaction with and without a catalyst. Determine the effects of concentration, temperature, surface area, and catalysts on reaction rates. Reactant and product...
Lesson Info Launch Gizmo3D Eclipse
- Free!
FREE with no time limit!
5 Minute Preview
Observe the motions of the Earth, Moon and Sun in three dimensions to investigate the causes and frequency of eclipses. Observe Earth's shadow crossing the Moon during a lunar eclipse, and...
Lesson Info Launch GizmoSound Off, Please!: Designing Solutions to Reduce Noise Pollution
- Stem Case
Video Preview
As an acoustic engineer, students will work with an urban planner to learn how noise pollution impacts a community. Students will develop a system model to test design solutions. Wave...
Lesson InfoDiffusion
- Stem Case
Video Preview
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash.
Lesson InfoBeat the Heat: Tackling Urban Heat Islands Using the Science of Energy
- Stem Case
Video Preview
Lake City's latest heat wave has more people in the hospital than ever before. Juan, a local student admitted to the hospital, lives in one of the hottest neighborhoods in the city....
Lesson InfoWater Crisis: Stoichiometry
- Stem Case
Video Preview
There has been an outbreak of legionnaires’ disease in a small town. This disease is caused by legionella bacteria that proliferate in contaminated water supplies. Students take on the...
Lesson InfoSurface and Lateral Areas of Pyramids and Cones
5 Minute Preview
Vary the dimensions of a pyramid or cone and investigate how the surface area changes. Use the dynamic net of the solid to compute the lateral area and the surface area of the solid.
Lesson Info Launch GizmoSurface and Lateral Areas of Prisms and Cylinders
5 Minute Preview
Vary the dimensions of a prism or cylinder and investigate how the surface area changes. Use the dynamic net of the solid to compute the lateral area and the surface area of the solid.
Lesson Info Launch GizmoMeasuring Volume
5 Minute Preview
Measure the volume of liquids and solids using beakers, graduated cylinders, overflow cups, and rulers. Water can be poured from one container to another and objects can be added to containers. A pipette can be used to transfer small amounts of water, and a magnifier can be used to observe the meniscus in a graduated cylinder. Test your volume-measurement skills in the "Practice" mode of the Gizmo.
Lesson Info Launch GizmoBalancing Blocks (Volume)
5 Minute Preview
This Gizmo provides you with two challenges. First, use blocks to build a figure with a given volume. Then, try to balance the blocks on a platform that sits on the tip of a cone. The dimensions of the platform can be adjusted, and blocks can be added or deleted by clicking on the model.
Lesson Info Launch GizmoArea of Parallelograms
5 Minute Preview
Examine and manipulate a parallelogram and find its area. Explore the relationship between the area of a parallelogram and the area of a rectangle using an animation.
Lesson Info Launch GizmoArea of Triangles
5 Minute Preview
Use a dynamic triangle to explore the area of a triangle. With the help of an animation, see that any triangle is always half of a parallelogram (with the same base and height). Likewise, a similar animation shows the connection between parallelograms and rectangles.
Lesson Info Launch GizmoHearing: Frequency and Volume
5 Minute Preview
Test your hearing range by listening to low-, medium-, and high-frequency sounds. Compare the relative loudness of sounds at each frequency to create an equal-loudness curve. In a quiet room, measure your threshold of audibility for each frequency, and compare your results to others. The volume of each sound can be adjusted.
Lesson Info Launch GizmoCircumference and Area of Circles
5 Minute Preview
Resize a circle and compare its radius, circumference, and area.
Lesson Info Launch GizmoPerimeter and Area of Rectangles
5 Minute Preview
Discover how to find the perimeter and area of a rectangle, and of a square (which is really just a special case of a rectangle).
Lesson Info Launch GizmoPyramids and Cones
5 Minute Preview
Vary the height and base-edge or radius length of a pyramid or cone and examine how its three-dimensional representation changes. Determine the area of the base and the volume of the solid. Compare the volume of a skew pyramid or cone to the volume of a right pyramid or cone.
Lesson Info Launch GizmoPrisms and Cylinders
5 Minute Preview
Vary the height and base-edge or radius length of a prism or cylinder and examine how its three-dimensional representation changes. Determine the area of the base and the volume of the solid. Compare the volume of an oblique prism or cylinder to the volume of a right prism or cylinder.
Lesson Info Launch GizmoMultiplying Decimals (Area Model)
5 Minute Preview
Model the product of two decimals by finding the area of a rectangle. Estimate the area of the rectangle first. Then break the rectangle into several pieces and find the area of each piece (partial product). Add these areas together to find the whole area (product).
Lesson Info Launch GizmoFinding Factors with Area Models
5 Minute Preview
Find factors of a number using an area model. Reshape the area rectangle to see different factorizations of the number. Find the prime factorization using a factor tree.
Lesson Info Launch GizmoModeling Fractions (Area Models)
- Free!
FREE with no time limit!
5 Minute Preview
Model and compare fractions using area models. Set the denominators with the arrow buttons, and then set the numerators with the arrow buttons or by clicking in the models. Compare fractions visually, on a number line, or numerically using the least common denominator.
Lesson Info Launch GizmoPerimeters and Areas of Similar Figures
5 Minute Preview
Manipulate two similar figures and vary the scale factor to see what changes are possible under similarity. Explore how the perimeters and areas of two similar figures compare.
Lesson Info Launch GizmoModeling Decimals (Area and Grid Models)
5 Minute Preview
Model and compare decimals using area models. Set the number of sections in each model to 1, 10, or 100, and then click in the models to shade sections. Compare decimals visually and on a number line.
Lesson Info Launch GizmoFido's Flower Bed (Perimeter and Area)
5 Minute Preview
Construct models of gardens on a grid using squares of sod. Fence the gardens to find and compare perimeters. Work with pre-built gardens made of 36 squares each to compare perimeters of shapes with equal areas.
Lesson Info Launch GizmoChocomatic (Multiplication, Arrays, and Area)
- Free!
FREE with no time limit!
5 Minute Preview
Use the Chocomatic to design candy bars made out of chocolate squares. Use multiplication to find the number of squares in each chocolate bar. Build collections of chocolate bars that all have the same number of squares. Solve multiplication problems by joining two smaller chocolate bars into a large bar.
Lesson Info Launch GizmoFraction, Decimal, Percent (Area and Grid Models)
5 Minute Preview
Model and compare fractions, decimals, and percents using area models. Each area model can have 10 or 100 sections and can be set to display a fraction, decimal, or percent. Click inside the area models to shade them. Compare the numbers visually or on a number line.
Lesson Info Launch GizmoCollision Theory
- Free!
FREE with no time limit!
5 Minute Preview
Observe a chemical reaction with and without a catalyst. Determine the effects of concentration, temperature, surface area, and catalysts on reaction rates. Reactant and product concentrations through time are recorded, and the speed of the simulation can be adjusted by the user.
Lesson Info Launch GizmoFraction Artist 2 (Area Models of Fractions)
5 Minute Preview
Extend understanding of fractions by making modern paintings in the style of Piet Mondrian. Create and analyze paintings with different-sized sections. Compare the sizes of unit fractions. Find creative ways to color one-half of a painting. This can be a nice introduction to adding fractions with unlike denominators.
Lesson Info Launch GizmoFraction Artist 1 (Area Models of Fractions)
5 Minute Preview
Develop understanding of fractions by making modern paintings. Find different ways to divide a canvas into equal-sized sections. Make paintings to represent simple fractions and to find fractions that are equivalent to one-half.
Lesson Info Launch GizmoDensity
5 Minute Preview
Measure the mass and volume of a variety of objects, then place them into a beaker of liquid to see if they float or sink. Learn to predict whether objects will float or sink in water based on their mass and volume. Compare how objects float or sink in a variety of liquids, including gasoline, oil, seawater, and corn syrup.
Lesson Info Launch GizmoDensity Laboratory
5 Minute Preview
With a scale to measure mass, a graduated cylinder to measure volume, and a large beaker of liquid to observe flotation, the relationship between mass, volume, density, and flotation can be investigated. The density of the liquid in the beaker can be adjusted, and a variety of objects can be studied during the investigation.
Lesson Info Launch GizmoMultiplying Fractions
5 Minute Preview
Multiply two fractions using an area model. Vary the vertical area to change one fraction and vary the horizontal area to change the other. Then examine the intersection of the areas to find the product.
Lesson Info Launch GizmoSound Off, Please!: Designing Solutions to Reduce Noise Pollution
- Stem Case
Video Preview
As an acoustic engineer, students will work with an urban planner to learn how noise pollution impacts a community. Students will develop a system model to test design solutions. Wave properties of sound and how sound interacts with different surfaces will be explored and used as evidence to reduce noise pollution.
Lesson InfoMultiplying with Decimals
5 Minute Preview
Multiply two decimals using a dynamic area model. On a grid, shade the region with width equal to one of the decimals and height equal to the other decimal and find the area of the region.
Lesson Info Launch GizmoAddition of Polynomials
5 Minute Preview
Add polynomials using an area model. Use step-by-step feedback to diagnose any mistakes.
Lesson Info Launch GizmoModeling the Factorization of x2+bx+c
5 Minute Preview
Factor a polynomial with a leading coefficient equal to 1 using an area model. Use step-by-step feedback to diagnose any mistakes.
Lesson Info Launch GizmoSticky Molecules
- New!
5 Minute Preview
Learn about molecular polarity and how polarity gives rise to intermolecular forces. Measure four macroscopic properties of liquids (cohesion, adhesion, surface tension, and capillary rise). Compare these properties for different liquids and relate them to whether the substances are polar or nonpolar.
Lesson Info Launch GizmoPercents, Fractions, and Decimals
5 Minute Preview
Compare a quantity represented by an area with its percent, fraction, and decimal forms.
Lesson Info Launch GizmoPart-to-part and Part-to-whole Ratios
5 Minute Preview
Compare a ratio represented by an area with its percent, fraction, and decimal forms.
Lesson Info Launch GizmoSquare Roots
5 Minute Preview
Explore the meaning of square roots using an area model. Use the side length of a square to find the square root of a decimal number or a whole number.
Lesson Info Launch GizmoModeling the Factorization of ax2+bx+c
5 Minute Preview
Factor a polynomial with a leading coefficient greater than 1 using an area model. Use step-by-step feedback to diagnose any mistakes.
Lesson Info Launch GizmoPhases of Water
5 Minute Preview
Heat or cool a container of water and observe the phase changes that take place. Use a magnifying glass to observe water molecules as a solid, liquid, or gas. Compare the volumes of the three phases of water.
Lesson Info Launch GizmoBoyle's Law and Charles's Law
5 Minute Preview
Investigate the properties of an ideal gas by performing experiments in which the temperature is held constant (Boyle's Law), and others in which the pressure remains fixed (Charles's Law). The pressure is controlled through the placement of masses on the lid of the container, and temperature is controlled with an adjustable heat source. Gay-Lussac's law relating pressure to temperature can also be explored by keeping the volume constant.
Lesson Info Launch GizmoIdeal Gas Law
- New!
5 Minute Preview
Explore relationships between amount, temperature, pressure, and volume for an ideal gas in a chamber with a moveable piston. Discover rules of proportionality contained in Boyle's law, Charles's law, Avogadro's law, and Gay-Lussac's law. Use these relationships to derive the ideal gas law and calculate the value of the ideal gas constant.
Lesson Info Launch GizmoGeometric Probability
5 Minute Preview
Randomly throw darts at a target and see what percent are "hits." Vary the size of the target and repeat the experiment. Study the relationship between the area of the target and the percent of darts that strike it
Lesson Info Launch GizmoSums and Differences with Decimals
5 Minute Preview
Find the sum or difference of two decimal numbers using area models. Find the decimals and their sum or difference on a number line.
Lesson Info Launch GizmoForce and Fan Carts
5 Minute Preview
Explore the laws of motion using a simple fan cart. Use the buttons to select the speed of the fan and the surface, and press Play to begin. You can drag up to three objects onto the fan cart. The speed of the cart is displayed with a speedometer and recorded in a table and a graph.
Lesson Info Launch GizmoRiemann Sum
5 Minute Preview
Approximate the area under a curve in an interval using rectangles. Compare the results of left-hand summation to the results of right-hand summation. Vary the interval and the number of rectangles and explore how the graph of the rectangles and curve change in response.
Lesson Info Launch GizmoOrdering Percents, Fractions, and Decimals Greater Than 1
5 Minute Preview
Compare and order numbers greater than 1 using area grids and a number line. Examine the numbers represented as percents, improper fractions, and decimals.
Lesson Info Launch GizmoUnit Conversions
5 Minute Preview
Use unit conversion tiles to convert from one unit to another. Tiles can be flipped to cancel units. Convert between metric units or between metric and U.S. customary units. Solve distance, time, speed, mass, volume, and density problems.
Lesson Info Launch GizmoDividing Fractions
5 Minute Preview
Divide fractions using area models. Adjust the numerators and denominators of the divisor and dividend and see how the area model and calculation change.
Lesson Info Launch GizmoDensity via Comparison
5 Minute Preview
Using four beakers of liquids with known densities, estimate the density of a variety of objects. Place each object into each beaker to see whether it sinks or floats, and then use this information to compare the densities of the objects.
Lesson Info Launch GizmoOrdering and Approximating Square Roots
5 Minute Preview
Order square roots on a number line. Approximate the square roots using the side lengths of square regions in a grid.
Lesson Info Launch GizmoStoichiometry
5 Minute Preview
Solve problems in chemistry using dimensional analysis. Select appropriate tiles so that units in the question are converted into units of the answer. Tiles can be flipped, and answers can be calculated once the appropriate unit conversions have been applied.
Lesson Info Launch GizmoOsmosis
5 Minute Preview
Adjust the concentration of a solute on either side of a membrane in a cell and observe the system as it adjusts to the conditions through osmosis. The initial concentration of the solute can be manipulated, along with the volume of the cell.
Lesson Info Launch GizmoCoriolis Effect
- New!
5 Minute Preview
The Coriolis effect causes winds to be deflected as they move across Earth's surface, resulting in circular patterns of winds. This effect is caused by two factors, Earth's rotation and frame of reference. In the Coriolis Effect Gizmo, students will build their understanding of this phenomenon using the analogy of two kids playing catch: first on a train, then on a merry-go-round, and finally on Earth's surface.
Lesson Info Launch GizmoPercents and Proportions
5 Minute Preview
Find a part from the percent and whole, a percent from the part and whole, or a whole from the part and percent using a graphic model.
Lesson Info Launch GizmoWeathering
5 Minute Preview
Weathering is the breakdown of rock at Earth's surface through physical or chemical means. Students will learn about the different types of mechanical and chemical weathering, then use a simulation to model the effects of weathering on different types of rocks in varying climate conditions.
Lesson Info Launch GizmoNatural Selection
5 Minute Preview
You are a bird hunting moths (both dark and light) that live on trees. As you capture the moths most easily visible against the tree surface, the moth populations change, illustrating the effects of natural selection.
Lesson Info Launch GizmoPhotoelectric Effect
5 Minute Preview
Shoot a beam of light at a metal plate in a virtual lab and observe the effect on surface electrons. The type of metal as well as the wavelength and amount of light can be adjusted. An electric field can be created to resist the electrons and measure their initial energies.
Lesson Info Launch GizmoCenter of Mass
5 Minute Preview
Drag blocks onto a two-dimensional surface and observe the effects on the center of mass. Use a grid to calculate the coordinates of the center of mass. Investigate predefined shapes or your own arrangements of blocks.
Lesson Info Launch GizmoDiffusion
- Stem Case
Video Preview
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash.
Lesson InfoEstimating Sums and Differences
5 Minute Preview
Estimate the sum or difference of two fractions using area models. Compare estimates to exact sums and differences.
Lesson Info Launch GizmoEquilibrium and Concentration
5 Minute Preview
Observe how reactants and products interact in reversible reactions. The initial amount of each substance can be manipulated, as well as the pressure on the chamber. The amounts, concentrations, and partial pressures of each reactant and product can be tracked over time as the reaction proceeds toward equilibrium.
Lesson Info Launch GizmoEquilibrium and Pressure
5 Minute Preview
Observe how reactants and products interact in reversible reactions. The amounts of each substance can be manipulated, as well as the pressure on the chamber. This lesson focuses on partial pressures, Dalton's law, and Le Chatelier's principle.
Lesson Info Launch GizmoConduction and Convection
5 Minute Preview
Two flasks hold colored water, one yellow and the other blue. Set the starting temperature of each flask, choose a type of material to connect the flasks, and see how quickly the flasks heat up or cool down. The flasks can be connected with a hollow pipe, allowing the water in the flasks to mix, or a solid chunk that transfers heat but prevents mixing.
Lesson Info Launch GizmoPythagorean Theorem
5 Minute Preview
Explore the Pythagorean Theorem using a dynamic right triangle. Examine a visual, geometric application of the Pythagorean Theorem, using the areas of squares on the sides of the triangle.
Lesson Info Launch GizmoDensity Experiment: Slice and Dice
5 Minute Preview
Drop a chunk of material in a beaker of water and observe whether it sinks or floats. Cut the chunk into smaller pieces of any size, and observe what happens as they are dropped in the beaker. The mass and volume of each chunk can be measured to gain a clear understanding of density and buoyancy.
Lesson Info Launch GizmoPhase Changes
5 Minute Preview
Explore the relationship between molecular motion, temperature, and phase changes. Compare the molecular structure of solids, liquids, and gases. Graph temperature changes as ice is melted and water is boiled. Find the effect of altitude on phase changes. The starting temperature, ice volume, altitude, and rate of heating or cooling can be adjusted.
Lesson Info Launch GizmoProgrammable Rover
- New!
5 Minute Preview
In this introduction to coding, program a rover to explore the surface of Mars. Start by using tiles to create simple programs involving moving forward or backward, turns, jumps, loops, and picking up rock samples. Then use text instructions to optimize your code. Use your skills to program the rover to complete six challenging missions on Mars.
Lesson Info Launch GizmoRelative Humidity
5 Minute Preview
Measure the temperature on wet and dry bulb thermometers to determine relative humidity. Measure the dew point by cooling a bucket of water until condensation forms on the surface. See how the relative humidity and dew point change over the course of a day.
Lesson Info Launch GizmoRock Cycle
5 Minute Preview
Play the role of a piece of rock moving through the rock cycle. Select a starting location and follow many possible paths throughout the cycle. Learn how rocks are formed, weathered, eroded, and reformed as they move from Earth's surface to locations deep within the crust.
Lesson Info Launch Gizmo3D Eclipse
- Free!
FREE with no time limit!
5 Minute Preview
Observe the motions of the Earth, Moon and Sun in three dimensions to investigate the causes and frequency of eclipses. Observe Earth's shadow crossing the Moon during a lunar eclipse, and the path of the Moon's shadow across Earth's surface during a solar eclipse. The angle of the Moon's orbit can be adjusted, as well as the distance of the Moon from the Earth.
Lesson Info Launch GizmoCritter Count (Modeling Multiplication)
5 Minute Preview
Use groups of critters on leaves to model multiplication as repeated addition. Change the expression to change the number of groups or the number of critters per group. Display the critters either on leaves or as a rectangular array.
Lesson Info Launch GizmoMineral Identification
5 Minute Preview
Observe and measure the properties of a mineral sample, and then use a key to identify the mineral. Students can observe the color, luster, shape, density, hardness, streak, and reaction to acid for each mineral. There are 26 mineral samples to identify.
Lesson Info Launch GizmoDye Elimination
5 Minute Preview
When a foreign substance such as a drug is ingested, it often remains in the bloodstream for a long time. This Gizmo models the elimination of substances from the bloodstream using water and dye. Add dye to a container of water, and then add beakers of pure water while removing beakers of dyed water. The amount of dye remaining is recorded after each cycle. The volumes of all containers can be adjusted, as well as the amount of dye used. This provides a good example of exponential decay.
Lesson Info Launch GizmoModeling Whole Numbers and Decimals (Base-10 Blocks)
5 Minute Preview
Model numbers with base-10 blocks. Drag flats, rods, and individual cubes onto a mat to model a number. Blocks can be exchanged from one area of the mat to the other. Four sets of blocks are available to model a variety of whole numbers and decimals.
Lesson Info Launch GizmoAdding Whole Numbers and Decimals (Base-10 Blocks)
- Free!
FREE with no time limit!
5 Minute Preview
Use base-10 blocks to model two numbers. Then combine the blocks to model the sum. Blocks of equal value can be exchanged from one area of the mat to the other to help understand carrying when adding. Four sets of blocks are available to model different place values.
Lesson Info Launch GizmoConvection Cells
- New!
5 Minute Preview
Explore the causes of convection by heating liquid and observing the resulting motion. The location and intensity of the heat source (or sources) can be varied, as well as the viscosity of the liquid. Use a probe to measure temperature and density in different areas and observe the motion of molecules in the liquid. Then, explore real-world examples of convection cells in Earth's mantle, oceans, and atmosphere.
Lesson Info Launch GizmoHuman Evolution - Skull Analysis
5 Minute Preview
Compare the skulls of a variety of significant human ancestors, or hominids. Use available tools to measure lengths, areas, and angles of important features. Each skull can be viewed from the front, side, or from below. Additional information regarding the age, location, and discoverer of each skull can be displayed.
Lesson Info Launch GizmoBeat the Heat: Tackling Urban Heat Islands Using the Science of Energy
- Stem Case
Video Preview
Lake City's latest heat wave has more people in the hospital than ever before. Juan, a local student admitted to the hospital, lives in one of the hottest neighborhoods in the city. Students are hired as the city's Chief Heat Officer to investigate and solve the problem. As the Chief Heat Officer, students look at land uses, surface air temperatures, and building materials across Lake City. Students will develop a system model to test several design solutions and give the mayor a proposal to beat the heat.
Lesson InfoSubtractive Colors
5 Minute Preview
Move spots of yellow, cyan, and magenta pigment on a white surface. As the colors overlap, other colors can be seen due to color subtraction. The color of most things you see--such as cars, leaves, paintings, houses, and clothes--are due to color subtraction. The intensity of the cyan, magenta, and yellow can be adjusted, and the RGB value at any location can be measured.
Lesson Info Launch GizmoOrbital Motion - Kepler's Laws
5 Minute Preview
Learn Kepler's three laws of planetary motion by examining the orbit of a planet around a star. The initial position, velocity, and mass of the planet can be varied as well as the mass of the star. The foci and centers of orbits can be displayed and compared to the location of the star. The area swept out by the planet in a given time period can be measured, and data on orbital radii and periods can be plotted in several ways.
Lesson Info Launch GizmoWater Crisis
- Stem Case
Video Preview
There has been an outbreak of legionnaires’ disease in a small town. This disease is caused by legionella bacteria that proliferate in contaminated water supplies. Students take on the role of an environmental chemist to investigate the source of legionella and use stoichiometry to decontaminate the water supply and remediate the disease outbreak.
Lesson InfoModeling Fractions (Area Models)
- Free!
FREE with no time limit!
5 Minute Preview
Model and compare fractions using area models. Set the denominators with the arrow buttons, and then set the numerators with the arrow buttons or by clicking in the models. Compare fractions visually, on a number line, or numerically using the least common denominator.
Lesson Info Launch GizmoChocomatic (Multiplication, Arrays, and Area)
- Free!
FREE with no time limit!
5 Minute Preview
Use the Chocomatic to design candy bars made out of chocolate squares. Use multiplication to find the number of squares in each chocolate bar. Build collections of chocolate bars that all have the same number of squares. Solve multiplication problems by joining two smaller chocolate bars into a large bar.
Lesson Info Launch GizmoAdding Whole Numbers and Decimals (Base-10 Blocks)
- Free!
FREE with no time limit!
5 Minute Preview
Use base-10 blocks to model two numbers. Then combine the blocks to model the sum. Blocks of equal value can be exchanged from one area of the mat to the other to help understand carrying when adding. Four sets of blocks are available to model different place values.
Lesson Info Launch GizmoCollision Theory
- Free!
FREE with no time limit!
5 Minute Preview
Observe a chemical reaction with and without a catalyst. Determine the effects of concentration, temperature, surface area, and catalysts on reaction rates. Reactant and product concentrations through time are recorded, and the speed of the simulation can be adjusted by the user.
Lesson Info Launch Gizmo3D Eclipse
- Free!
FREE with no time limit!
5 Minute Preview
Observe the motions of the Earth, Moon and Sun in three dimensions to investigate the causes and frequency of eclipses. Observe Earth's shadow crossing the Moon during a lunar eclipse, and the path of the Moon's shadow across Earth's surface during a solar eclipse. The angle of the Moon's orbit can be adjusted, as well as the distance of the Moon from the Earth.
Lesson Info Launch GizmoSound Off, Please!: Designing Solutions to Reduce Noise Pollution
- Stem Case
Video Preview
As an acoustic engineer, students will work with an urban planner to learn how noise pollution impacts a community. Students will develop a system model to test design solutions. Wave properties of sound and how sound interacts with different surfaces will be explored and used as evidence to reduce noise pollution.
Lesson InfoDiffusion
- Stem Case
Video Preview
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash.
Lesson InfoBeat the Heat: Tackling Urban Heat Islands Using the Science of Energy
- Stem Case
Video Preview
Lake City's latest heat wave has more people in the hospital than ever before. Juan, a local student admitted to the hospital, lives in one of the hottest neighborhoods in the city. Students are hired as the city's Chief Heat Officer to investigate and solve the problem. As the Chief Heat Officer, students look at land uses, surface air temperatures, and building materials across Lake City. Students will develop a system model to test several design solutions and give the mayor a proposal to beat the heat.
Lesson InfoWater Crisis: Stoichiometry
- Stem Case
Video Preview
There has been an outbreak of legionnaires’ disease in a small town. This disease is caused by legionella bacteria that proliferate in contaminated water supplies. Students take on the role of an environmental chemist to investigate the source of legionella and use stoichiometry to decontaminate the water supply and remediate the disease outbreak.
Lesson InfoFind Your Solution
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