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Free pre-algebra videos for middle school

This is a collection of free math videos for grade 7/pre-algebra (middle school), showing varied exercises for each topic. They match the Math Mammoth Grade 7 curriculum but will also work no matter which curriculum you follow (in other words, the videos don't rely on you having the Math Mammoth curriculum).

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These videos are usable for students, teachers, and parents. You can use them...

  • To learn these topics yourself (if you're a student for example, or an adult needing a refresher)
  • As lesson plans for teaching these topics. Often, one video from below can be made into several lessons with students.

Please choose a topic from the list below.


Chapter 1: The Language of Algebra

These topics provide foundation principles for our algebra studies.


Chapter 2: Integers

Introduction

Addition of Integers

Subtraction of Integers

Multiplying Integers

Dividing Integers

Lessons on Integers: solved examples


Chapter 3: Solving One–Step Equations

Solving Equations

Addition and Subtraction Equations

Multiplication and Division Equations

Word Problems

Constant Speed


Chapter 4: Rational Numbers

Rational Numbers, Part 1

Rational Numbers, Part 2 (repeating decimals)

Adding and Subtracting Rational Numbers

Multiply and Divide Rational Numbers 1

Multiply and Divide Rational Numbers 2

Many Operations with Rational Numbers

Many Operations with Rational Numbers, Part 2 – unit rate word problem

Equations with Fractions

Equations with Decimals

Percent Equations


Chapter 5: Linear Equations

Two-Step Equations

A Variable on Both Sides

Using the Distributive Property

Using the Distributive Property, Part 2

Word Problems

Word Problems and Inequalities

Graphing

An Introduction to Slope


Chapter 6: Ratios and Proportions

Solving Problems Using Equivalent Rates (review of a 6th grade topic)

Solving Proportions: Cross-Multiplying

Proportion Word Problem

Unit Rates

Proportional Relationships

More on Proportions

Scaling Figures

Floor Plans

Maps


Chapter 7: Percent

Solving Basic Percent Problems

Percent Equations

Simple Interest

Percentage of Change

Percentage Difference


Chapter 8: Geometry

These lessons belong to Math Mammoth Grade 7 / pre-algebra course. Other pre-algebra courses may cover different geometry topics.

Angle Relationships

Angles in a Triangle

Drawing Problems, Part 1

Drawing Problems, Part 2

Circumference of a Circle

Proving the Formula for the Area of a CircleS

Surface Area

Slicing Three-Dimensional Shapes
For this topic, hands-on experiences and/or interactive tools are far better than watching videos. Please use some of the free tools listed below.

Volume of prisms and cylinders


Chapter9: The Pythagorean Theorem

Square Roots

Equations that Involve Taking a Square Root

The Pythagorean Theorem

The Pythagorean Theorem: Applications 1 area of an isoseles triangle

The Pythagorean Theorem: Applications 2 diagonal of a square

The Pythagorean Theorem: Applications 3 volume of a triangular prism

The Pythagorean Theorem: Applications 4 perimeter of a trapezoid


Chapter 10: Probability

Introduction

Probability of Compound Events list the outcomes, draw a tree diagram

Practice Problems for Probability of Compound Events

See also: Free Probability Simulations for 7th Grade


Chapter 11: Statistics

Review of Data Analysis, Part 1 histograms

Review of Data Analysis, Part 2 boxplots

Random Sampling

Using Random Sampling

Comparing Two Populations



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