Grade 8 Math Units

Access Grade 8 Math unit plans with engaging, standards-aligned lessons that build algebra readiness, problem-solving, and real-world reasoning skills.

Grade 8 Math Units

Unit Plan 36 (Grade 8 Math): Cumulative Synthesis & Exhibition

8th graders demonstrate mastery through integrated performance tasks combining algebra, functions, geometry, and statistics. They model real situations, choose efficient methods, justify solutions with units and precision, and present evidence-based arguments with confidence and clarity.

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Grade 8 Math Units

Unit Plan 35 (Grade 8 Math): Number System & Exponents Spiral—Fluency & Sense-Making

8th graders strengthen number sense by classifying rational and irrational numbers, applying exponent rules, and mastering scientific notation. They approximate square roots, simplify powers, and interpret real-world quantities with precise scale and unit reasoning.

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Grade 8 Math Units

Unit Plan 34 (Grade 8 Math): Geometry Power-Up—Right Triangles & Volume Spiral

8th graders strengthen geometry mastery through targeted Pythagorean Theorem, distance, and volume word problems. They identify right triangles, apply formulas with correct units, and verify answers through conversions, rounding, and real-world reasonableness checks.

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Grade 8 Math Units

Unit Plan 33 (Grade 8 Math): Algebra Power-Up—Equations, Functions, & Systems Spiral

8th graders review and apply key algebra and function skills—solving multi-step equations, comparing functions, and solving systems by graphing or algebraic methods. They model real situations, choose efficient strategies, and justify their reasoning with precision and clarity.

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Grade 8 Math Units

Unit Plan 32 (Grade 8 Math): Linear Modeling Project—From Data to Decision

8th graders design and carry out a complete data investigation—posing a question, collecting or curating data, building a scatter plot, fitting a line of best fit, and interpreting slope and intercept. They make predictions, evaluate model limits, and present clear, evidence-based findings.

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Grade 8 Math Units

Unit Plan 31 (Grade 8 Math): Two-Way Tables & Associations

8th graders construct and interpret two-way relative frequency tables to explore relationships between categorical variables. They compare conditional percentages, identify possible associations, and write evidence-based conclusions using precise, responsible statistical language.

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Grade 8 Math Units

Unit Plan 30 (Grade 8 Math): Using Slope & Intercept for Prediction

8th graders interpret slope and intercept in real-world contexts, using linear models to predict and compare data. They decide when proportional or non-proportional models fit best, explain units and meaning clearly, and assess prediction reasonableness with evidence.

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Grade 8 Math Units

Unit Plan 29 (Grade 8 Math): Informal Lines of Best Fit

8th graders extend scatter plot analysis by drawing informal lines of best fit, writing equations from two line points, and using them to predict values. They evaluate fit visually, interpret slope and intercept in context, and explain interpolation vs. extrapolation with caution and precision.

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Grade 8 Math Units

Unit Plan 28 (Grade 8 Math): Patterns in Bivariate Data—Scatter Plots

8th graders construct and interpret scatter plots to explore relationships between two variables. They identify direction, form, strength, clusters, and outliers, and compare patterns across data sets using precise, evidence-based descriptions.

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Grade 8 Math Units

Unit Plan 27 (Grade 8 Math): Geometry Mixed Review—Transform, Compare, Solve

8th graders integrate geometry’s big ideas—transformations, similarity, angle reasoning, and Pythagorean applications—through real-world, multi-step problems. They choose strategies, justify methods, and model with precision across diagrams and coordinates.

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Grade 8 Math Units

Unit Plan 26 (Grade 8 Math): Similarity in Right Triangles (Extension/Spiral)

8th graders connect similarity and modeling by using AA similarity to solve right-triangle problems, create scale drawings, and perform indirect measurements. They apply proportions, justify scale factors, and verify results using the Pythagorean Theorem and real-world reasoning.

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Grade 8 Math Units

Unit Plan 25 (Grade 8 Math): Volume of Cylinders, Cones, and Spheres

8th graders explore and apply volume formulas for cylinders, cones, and spheres through hands-on modeling and real-world problems. They justify why formulas work, solve composite and missing-dimension tasks, and check units, conversions, and reasonableness.

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Grade 8 Math Units

Unit Plan 24 (Grade 8 Math): Pythagorean Applications & Distance

8th graders apply the Pythagorean Theorem to solve real-world and coordinate problems—finding unknown sides, diagonals, and distances. They derive the distance formula, use it in 2D and 3D contexts, and justify answers with units and reasoning.

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Grade 8 Math Units

Unit Plan 23 (Grade 8 Math): Pythagorean Theorem—Why It Works

8th graders explore why the Pythagorean Theorem works through visual and similarity-based proofs. They construct right triangles, justify a² + b² = c² with area and triangle reasoning, and prove its converse using clear, labeled diagrams.

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Grade 8 Math Units

Unit Plan 22 (Grade 8 Math): Angle Relationships & Triangle Facts

8th graders explore angle relationships in triangles and parallel-line diagrams, using informal proofs to show the triangle sum and exterior angle theorems. They solve for unknown angles and justify reasoning with clear geometric arguments.

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Grade 8 Math Units

Unit Plan 21 (Grade 8 Math): Dilations & Similarity

8th graders explore dilations and similarity, using centers and scale factors to model how figures resize while preserving angles and parallel lines. They apply coordinate rules, verify properties, and prove similarity through transformation sequences.

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Grade 8 Math Units

Unit Plan 20 (Grade 8 Math): Congruence via Rigid Motions

8th graders use sequences of rigid motions—translations, reflections, and rotations—to prove or disprove congruence between figures. They describe transformations precisely, track orientation, and justify congruence with clear reasoning.

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Grade 8 Math Units

Unit Plan 19 (Grade 8 Math): Transformations on the Coordinate Plane

8th graders explore translations, reflections, and rotations on the coordinate plane, using rules to track coordinate changes, verify preserved properties, and describe how each transformation affects orientation.

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Grade 8 Math Units

Unit Plan 18 (Grade 8 Math): Systems—Substitution & Elimination

8th graders master solving systems of linear equations using substitution and elimination, analyze special cases algebraically, and model real-world problems with systems, interpreting solutions clearly with units.

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Grade 8 Math Units

Unit Plan 17 (Grade 8 Math): Systems of Linear Equations—Graphing & Estimation

8th graders learn to solve systems of linear equations by graphing, identifying intersections as solutions, and estimating non-integer points. They interpret intersections in real contexts and recognize special cases visually.

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Grade 8 Math Units

Unit Plan 16 (Grade 8 Math): Qualitative Graphs & Stories of Change

8th graders analyze and sketch graphs to describe how quantities increase, decrease, or remain constant. They interpret steepness, key features, and domains to connect visual patterns with real-world stories.

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Grade 8 Math Units

Unit Plan 15 (Grade 8 Math): Building Linear Models from Context

8th graders learn to construct linear functions from real data and contexts, determine slope and intercept, and interpret their meanings. Students model relationships, graph equations, and evaluate predictions for reasonableness.

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Grade 8 Math Units

Unit Plan 14 (Grade 8 Math): Linear vs. Nonlinear

8th graders learn to distinguish linear from nonlinear functions by analyzing rules, graphs, and tables. They identify constant rates of change, recognize curved patterns, and justify conclusions using slope evidence.

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Grade 8 Math Units

Unit Plan 13 (Grade 8 Math): Comparing Functions—Multiple Representations

8th graders compare functions shown as rules, graphs, or tables to identify rate of change and initial value. Students determine which function changes faster or starts higher and justify comparisons using units and context.

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Grade 8 Math Units

Unit Plan 12 (Grade 8 Math): From Patterns to Functions

8th graders learn the formal definition of a function and identify functions from tables, mappings, and graphs. They use input–output language, function notation, and domain–range reasoning to describe real-world relationships.