Grade 8 Math Lessons

Teach concepts like congruence, slope, linear equations, exponents, and the Pythagorean theorem with these free 8th grade lessons from our complete, standards-aligned math program, Amplify Desmos Math.

Grades: 8th Grade

• Rigid Transformations and Congruence

  Students investigate translations, reflections, and rotations, and use these transformations to make informal arguments about congruence. They also explore angle relationships on parallel lines and the triangle sum theorem.

• Transformers
• Spinning, Flipping, Sliding
• Transformation Targets
• Moving Day
• Getting Coordinated, Part 1
• Getting Coordinated, Part 2
• Tessellate
• Puzzling It Out

• Dilations, Similarity, and Slope

  Students visualize and perform dilations using scale factors and centers of dilation on and off a grid. They’ll recognize when two figures are similar, congruent, or neither using transformations.

• Sketchy Dilations
• Dilation Mini Golf
• Social Scavenger Hunt

• Proportional and Linear Relationships

  Students deepen their understanding of proportional relationships, and are introduced to linear relationships. They create and connect representations, including interpreting slope, vertical intercept, and horizontal intercept of linear relationships in context.

• Turtle Time Trials
• Flags
• Water Cooler
• Ups and Downs
• Stacking Cups
• Translations

• Linear Equations and Linear Systems

  Students explore a variety of strategies to solve linear equations with variables on both sides of the equation. They investigate systems of linear equations in two variables. They develop conceptual understanding of what the solution to a system means graphically and algebraically.

• Equation Roundtable
• Line Zapper
• Make Them Balance
• String Lights
• Frosty Figures

• Functions and Volume

  Students learn about functions and analyze representations of functions, such as graphs and equations. They examine functions in the context of the volume of cylinders and cones.

• Turtle Crossing
• Guess My Rule
• The Tortoise and the Hare
• Cylinders
• Cones

• Associations in Data

  Students examine different ways to organize numerical data, including scatter plots. They use scatter plots, linear models, and segmented bar graphs to analyze numerical data and identify associations.

• Robots
• Dapper Cats
• Interpreting Scatter Plots
• Find the Fit
• Interpreting Slopes
• Scatter Plot City
• Animal Brains
• Finding Associations

• Exponents and Scientific Notation

  Students develop fluency with expressions involving exponents, powers of 10, and scientific notation. They analyze patterns that grow exponentially, explore expressions with equivalent notations, and use multiplication and division to estimate how many times larger or smaller one quantity is than another.

• Circles
• Power Pairs
• Specific and Scientific
• Balance the Scale

• The Pythagorean Theorem and Irrational Numbers

  Students explore the Pythagorean theorem and different types of numbers (square roots and cube roots, rational and irrational numbers).

• Root Down
• Triangle-Tracing Turtle
• Taco Truck

• Boost Personalized Learning

• Grade 8: Personalized Learning and Intervention

• Amplify Classroom Activities

  Explore these other free math lessons and activities, including favorites from Desmos Classroom! Copy and edit to customize these and make them your own.

• Batty Dilation
• Flake-tastic Fun
• Marbleslides: Winter Quadratics
• Marbleslides: Winter Challenge
• Central Park
• Connecting the Dots
• Contour Golf
• Coin Capture: Lines
• Coin Capture: Practice on Your Own
• Fall Hanger Diagrams
• Land the Plane
• Points on a Line
• Point Zapper
• Pounds of Pumpkins
• Scatter Plot Capture
• The Solar System, Test Tubes, and Scientific Notation
• Which is Steepest?
• Soccer Marbleslides