Essential Knowledge and Skills (TEKS)
8.1.A: compare and order rational numbers in various forms including integers, percents, and positive and negative fractions and decimals;
Comparing and Ordering Decimals
Comparing and Ordering Fractions
Comparing and Ordering Integers
Ordering Percents, Fractions and Decimals
Ordering Percents, Fractions and Decimals Greater Than 1
Percents and Proportions
8.1.B: select and use appropriate forms of rational numbers to solve real-life problems including those involving proportional relationships;
Estimating Population Size
Improper Fractions and Mixed Numbers
8.1.C: approximate (mentally and with calculators) the value of irrational numbers as they arise from problem situations (such as pi, square root of 2); and
8.3.B: estimate and find solutions to application problems involving percents and other proportional relationships such as similarity and rates.
Perimeters and Areas of Similar Figures
Similar Figures - Activity A
Similar Polygons
8.4.A: The student is expected to generate a different representation of data given another representation of data (such as a table, graph, equation, or verbal description).
Introduction to Functions
Linear Functions
Using Tables, Rules and Graphs
8.5.A: predict, find, and justify solutions to application problems using appropriate tables, graphs, and algebraic equations; and
Distance-Time Graphs
Graphing Skills
8.5.B: find and evaluate an algebraic expression to determine any term in an arithmetic sequence (with a constant rate of change).
Arithmetic Sequences
Arithmetic and Geometric Sequences
Using Algebraic Equations
Using Algebraic Expressions
8.6.A: generate similar figures using dilations including enlargements and reductions; and
Perimeters and Areas of Similar Figures
Similar Figures - Activity A
Similar Polygons
8.6.B: graph dilations, reflections, and translations on a coordinate plane.
Circles
Dilations
Quilting Bee (Symmetry)
Reflections
Rock Art (Transformations)
Rotations, Reflections and Translations
Translations
8.7.B: use geometric concepts and properties to solve problems in fields such as art and architecture;
8.7.C: use pictures or models to demonstrate the Pythagorean Theorem; and
Distance Formula - Activity A
Geoboard: The Pythagorean Theorem
Pythagorean Theorem - Activity A
Pythagorean Theorem - Activity B
8.7.D: locate and name points on a coordinate plane using ordered pairs of rational numbers.
City Tour (Coordinates)
Points in the Coordinate Plane - Activity A
8.8.A: find lateral and total surface area of prisms, pyramids, and cylinders using concrete models and nets (two-dimensional models);
Prisms and Cylinders - Activity A
Surface and Lateral Area of Prisms and Cylinders
Surface and Lateral Area of Pyramids and Cones
8.8.B: connect models of prisms, cylinders, pyramids, spheres, and cones to formulas for volume of these objects; and
Prisms and Cylinders - Activity A
Pyramids and Cones - Activity A
8.8.C: estimate measurements and use formulas to solve application problems involving lateral and total surface area and volume.
Prisms and Cylinders - Activity A
8.9.A: use the Pythagorean Theorem to solve real-life problems; and
Distance Formula - Activity A
Geoboard: The Pythagorean Theorem
Pythagorean Theorem - Activity A
Pythagorean Theorem - Activity B
8.9.B: use proportional relationships in similar two-dimensional figures or similar three-dimensional figures to find missing measurements.
Perimeters and Areas of Similar Figures
8.10.A: describe the resulting effects on perimeter and area when dimensions of a shape are changed proportionally; and
Area of Parallelograms - Activity A
Circle: Circumference and Area
Minimize Perimeter
Perimeter, Circumference, and Area - Activity B
Prisms and Cylinders - Activity A
Rectangle: Perimeter and Area
8.10.B: describe the resulting effect on volume when dimensions of a solid are changed proportionally.
Circle: Circumference and Area
Prisms and Cylinders - Activity A
Pyramids and Cones - Activity A
8.11.A: find the probabilities of dependent and independent events;
Compound Independent Events
Compound Independent and Dependent Events
Spin the Big Wheel! (Probability)
8.11.B: use theoretical probabilities and experimental results to make predictions and decisions; and
Geometric Probability - Activity A
Probability Simulations
Spin the Big Wheel! (Probability)
Theoretical and Experimental Probability
8.11.C: select and use different models to simulate an event.
8.12.A: select the appropriate measure of central tendency or range to describe a set of data and justify the choice for a particular situation;
Box-and-Whisker Plots
Describing Data Using Statistics
Line Plots
Mean, Median and Mode
Movie Reviewer (Mean and Median)
Reaction Time 1 (Graphs and Statistics)
8.12.B: draw conclusions and make predictions by analyzing trends in scatterplots; and
Correlation
Scatter Plots - Activity A
Solving Using Trend Lines
8.12.C: select and use an appropriate representation for presenting and displaying relationships among collected data, including line plots, line graphs, stem and leaf plots, circle graphs, bar graphs, box and whisker plots, histograms, and Venn diagrams, with and without the use of technology.
Box-and-Whisker Plots
Describing Data Using Statistics
Graphing Skills
Histograms
Line Plots
Mean, Median and Mode
Reaction Time 1 (Graphs and Statistics)
Stem-and-Leaf Plots
Correlation last revised: 8/7/2014