Grade 8 Math Lessons

156 lessons

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Integer operations

4 lessons

1Comparing and Ordering Integers12 min 2Adding and Subtracting Integers in Context16 min 3Multiplying and Dividing Integers12 min 4Order of Operations with Integers and Finding Errors15 min

Operations with rational numbers

5 lessons

1Comparing and Ordering Rational Numbers14 min 2Adding and Subtracting Signed Rational Numbers13 min 3Multiplying and Dividing Rational Numbers13 min 4Converting Between Fractions and Decimals14 min 5Evaluate, Apply and Check Rational Number Operations20 min

Fractions, decimals, and percents

3 lessons

1Equivalent Fractions and Reciprocals15 min 2Converting Fractions, Decimals, and Percents16 min 3Compare and Order Fractions, Decimals, and Percents13 min

Ratios, rates, and proportions

3 lessons

1Ratios and Unit Rates15 min 2Solve, Interpret, and Check Proportions20 min 3Scale Drawings: Find Real and Drawing Lengths12 min

Percents

3 lessons

1Parts, Wholes, and Percent Equations18 min 2Percent of Change: Compare with the Original Amount12 min 3Percent Word Problems and Fixing Errors17 min

Unit rates and measurement conversion

3 lessons

1Converting Units, Including Customary and Metric15 min 2Converting Rates and Measurements12 min 3Compare and Apply Unit Rates15 min

Algebraic expressions

2 lessons

1Reading and Writing Algebraic Expressions20 min 2Evaluating Expressions: Powers, Roots and Absolute Value20 min

Equivalent expressions

3 lessons

1Properties of Operations and the Distributive Property15 min 2Combine Like Terms, Simplify, and Find Errors18 min 3Factoring and Recognizing Equivalent Linear Expressions15 min

One-step and two-step equations

4 lessons

1Solutions of Equations and Properties of Equality15 min 2Inverse Operations and Error Checks18 min 3Model and Solve Equations with Algebra Tiles12 min 4Writing and Solving Equations from Word Problems12 min

One-variable inequalities

3 lessons

1What Counts as a Solution of an Inequality?12 min 2Graph and Write Inequalities on Number Lines15 min 3Solving Inequalities and Reversing the Symbol20 min

The coordinate plane

3 lessons

1Axes, Quadrants, and Ordered Pairs15 min 2Graphing Polygons on the Coordinate Plane12 min 3Horizontal and Vertical Distance on the Coordinate Plane16 min

Repeating decimals and rational numbers

3 lessons

1Rational and Irrational Numbers12 min 2Long Division, Remainders, and Repeating Decimals18 min 3Converting Repeating Decimals to Fractions12 min

Square roots and cube roots

4 lessons

1Square Roots and the Equations They Solve16 min 2Cube Roots and Cube Root Equations14 min 3Why the Square Root of 2 Is Irrational14 min 4Estimate Square and Cube Roots, Then Fix Errors16 min

Approximating irrational numbers

3 lessons

1Rational or Irrational? Approximating Square Roots20 min 2Locating Irrational Numbers on a Number Line12 min 3Comparing Irrational Numbers and Estimating Expressions16 min

Properties of exponents

4 lessons

1Evaluating Powers, Including Negative Bases14 min 2Same-Base Products, Quotients and Powers of Powers15 min 3Powers of Products and Quotients12 min 4Evaluate and Identify Equivalent Exponent Expressions15 min

Negative and zero exponents

3 lessons

1Zero and Negative Exponents: Meaning and Evaluation14 min 2Simplify Negative Exponents and Find Exponent Errors16 min 3Solving Equations with Variable Exponents12 min

Scientific notation

3 lessons

1Converting and Reading Scientific Notation16 min 2Compare, Estimate, and Find How Many Times as Much18 min 3Choosing Units of Appropriate Size12 min

Operations with scientific notation

3 lessons

1Multiplying and Dividing in Scientific Notation15 min 2Scientific Notation: Sums, Differences and Mixed Forms15 min 3Scientific Notation: Word Problems and Error Checks15 min

Proportional relationships

3 lessons

1Proportional Relationships: Constants and Equations18 min 2Graph Proportional Relationships: Unit Rate as Slope15 min 3Compare Proportional Relationships and Solve Problems16 min

Slope

4 lessons

1Slope: Four Types and How to Find It20 min 2Missing Coordinates and Graphing with Slope15 min 3Similar Triangles Explain Constant Slope12 min 4Finding and Fixing Slope Errors13 min

Slope-intercept form

3 lessons

1Slope-Intercept Form: Read It and Write It15 min 2Graphing Lines and Writing Equations from Graphs15 min 3Equations from Two Points: Write, Derive, and Check20 min

Graphing linear equations

4 lessons

1Solutions, Tables, and Lines16 min 2Graphing Horizontal and Vertical Lines12 min 3Standard Form: Rewriting and Graphing Lines16 min 4How Slope and Y-Intercept Change a Line13 min

Multi-step equations

3 lessons

1Combine Like Terms and Distribute to Solve Equations15 min 2Solving and Justifying Multi-Step Equations20 min 3Turning Word Problems into Multi-Step Equations13 min

Equations with variables on both sides

3 lessons

1Solve Equations by Collecting Variables on Either Side16 min 2Distribution, Rational Coefficients and Error Analysis20 min 3Word Problems with Variables on Both Sides13 min

Number of solutions of linear equations

2 lessons

1How Many Solutions? Transform, Read, and Justify20 min 2No Solutions or Infinitely Many: Build and Check15 min

Systems of equations by graphing

2 lessons

1Solutions of a System and the Intersection Point14 min 2Graphing Systems: Solve, Count Solutions, Fix Errors20 min

Solving systems of equations algebraically

3 lessons

1Solving Systems by Inspection and Substitution16 min 2Solving Systems by Elimination16 min 3Choose a Method, Count Solutions and Fix Errors20 min

Systems of equations word problems

3 lessons

1Write, Solve and Interpret Systems from Word Problems20 min 2Comparing Two Plans with a System of Equations13 min 3Solving Rate and Mixture Problems with Systems13 min

Identifying functions

3 lessons

1What Is a Function? Variables, Tables and Ordered Pairs18 min 2Read Functions and Values from Graphs15 min 3Domain and Range of a Function13 min

Linear and nonlinear functions

3 lessons

1Reading y = mx + b as a Linear Function13 min 2Linear or Nonlinear? Comparing Patterns of Change20 min 3Evaluating Nonlinear Functions12 min

Comparing functions

3 lessons

1Comparing Rates of Change and Initial Values16 min 2Comparing Functions Across Equations, Tables and Graphs13 min 3Compare Functions in Context and Justify Growth16 min

Constructing linear functions

3 lessons

1Evaluate a linear function and complete its table15 min 2Recover a Linear Function from a Table or Graph15 min 3Linear Functions in Context: Write, Interpret, Check21 min

Analyzing graphs of functions

2 lessons

1Increasing, Decreasing, Linear and Nonlinear Intervals15 min 2Interpret, Sketch and Critique Story Graphs20 min

Angle relationships

3 lessons

1Identify Angle Relationships in a Figure12 min 2Angle Relationships: Measures, Equations, and Errors18 min 3Bisected Segments and Angles12 min

Classifying polygons and quadrilaterals

2 lessons

1Classify Polygons, Triangles and Quadrilaterals20 min 2Missing Angles in Quadrilaterals and Polygons16 min

Perimeter and area

3 lessons

1Perimeter and Area from Given Dimensions20 min 2Circles: Area, Circumference, and Finding Errors15 min 3Area of Composite Figures: Split, Add, Subtract13 min

Translations, reflections, and rotations

4 lessons

1Rigid Motions and Translations on the Coordinate Plane16 min 2Reflecting Figures on the Coordinate Plane13 min 3Rotate Figures and Write Transformation Rules17 min 4Describe, Verify and Correct Rigid Motions20 min

Congruence transformations

3 lessons

1Congruent Figures and Corresponding Parts18 min 2Graph and Describe Congruence Transformation Sequences16 min 3Justify Whether Two Figures Are Congruent12 min

Dilations and similarity

3 lessons

Angles in triangles and parallel lines

3 lessons

1Transversal Angle Pairs and Missing Measures15 min 2Triangle Angles, Exterior Angles and Solving for x20 min 3Angle-Angle Similarity and the Triangle Angle Sum15 min

Pythagorean theorem

4 lessons

1Naming the Legs and Hypotenuse of a Right Triangle12 min 2Pythagorean Theorem: Find Missing Sides, Fix Errors18 min 3Pythagorean Theorem: Perimeter, Area and Word Problems15 min 4Space Diagonals: The Pythagorean Theorem in 3D12 min

Proof and converse of the Pythagorean theorem

2 lessons

1Pythagorean Triples and the Right Triangle Test16 min 2Proving the Converse of the Pythagorean Theorem13 min

Distance in the coordinate plane

3 lessons

1Finding Distance Between Points and Fixing Errors15 min 2Perimeter and Distance Problems on the Coordinate Plane15 min 3Verify a Right Triangle on the Coordinate Plane12 min

Surface area and volume of prisms

4 lessons

1Parts of Solids and Their Nets15 min 2Volume of Prisms and Pyramids13 min 3Surface Area of Prisms and Pyramids10 min 4Surface Area or Volume? Prism Word Problems12 min

Volume of cylinders and cones

3 lessons

1Volume of Cylinders and Cones15 min 2Volume: Missing Dimensions, Word Problems, Error Checks20 min 3Comparing Cylinder and Cone Volumes12 min

Volume of spheres and composite solids

3 lessons

1Spheres: Volume, Radius, and Real-World Problems18 min 2Volume of Composite Solids12 min 3Comparing Cylinder, Cone, and Sphere Volumes13 min

One-variable statistics

4 lessons

1Mean, Median, Mode, Range and Missing Values15 min 2Quartiles and Interquartile Range12 min 3Create and Interpret Box Plots12 min 4Outliers and Their Effect on Mean and Median12 min

Scatter plots

3 lessons

1Association, Clusters, and Outliers in Scatter Plots15 min 2Construct a Scatter Plot from Paired Values12 min 3Linear and Nonlinear Associations: Predict and Describe20 min

Lines of best fit

2 lessons

1Lines of Best Fit: Choose a Line and Judge Its Fit20 min 2Fit a Line and Write Its Equation16 min

Interpreting linear models

2 lessons

1Interpreting the Slope and Y-Intercept of a Linear Model15 min 2Making and Checking Predictions with Linear Models20 min

Two-way frequency tables

2 lessons

1Reading and Building Two-Way Frequency Tables16 min 2Relative Frequencies, Word Problems and Association20 min