Free math video lessons for 8th grade

This is a collection of free math videos for 8th grade topics. This is currently a mixture of my own videos and videos from Khan Academy. We are working on making many more videos (fall 2024)! The videos are matched to the topics in Math Mammoth Grade 8 curriculum. The videos from Khan Academy are not an exact match with the curriculum, but are better than nothing. I just want to list them to help my users in the interim.

Chapter 1

The Order of Operations (review from 7th grade)

Powers with Negative Bases

Laws of Exponents, part 1 — product and quotient of powers with the same base

Zero and Negative Exponents

Chapter 2

Geometric Transformations and Congruence, Part 1

Geometric Transformations and Congruence, Part 2

Translations in the Coordinate Grid

Reflections in the Coordinate Grid

Translations and Reflections

Rotations in the Coordinate Grid

Sequences of Transformations

Dilations

Dilations in the Coordinate Grid

Similar Figures
Testing similarity through transformations

Review: Angle Relationships
Angle relationships and unknown angle problems

Corresponding Angles
Angles, parallel lines, & transversals

More Angle Relationships with Parallel Lines
Alternate Interior and Alternate Exterior Angles (YT) by Mrs. Kibler

The Angle Sum of a Triangle
Angles in a triangle add up to 180 degrees
Isosceles & equilateral triangles problems

Exterior Angles of a Triangle
Triangle: exterior angles

Angles in Similar Triangles, Part 1

Angles in Similar Triangles, Part 2

Volume of Prisms and Cylinders

Volume of Pyramids and Cones
Volume of a cone: example

Volume of Spheres
Volume of a sphere

For the rest of the 8th grade topics, until we're able to make more videos, I will refer you to Khan Academy's videos:

Chapter 3: Linear Equations

Solving equations (at Khan Academy)

Chapter 4: Introduction to Functions

Linear Equations and Functions — from the subtitle "Functions" onward (at Khan Academy)

Chapter 5: Graphing Linear Equations

Linear Equations and Functions — up until the subtitle "Functions" (at Khan Academy)

Chapter 6: Irrational Numbers and the Pythagorean Theorem

Numbers and operations (at Khan Academy)

Geometry — scroll down to the Pythagorean Theorem (at Khan Academy)

Chapter 7: Systems of Linear Equations

Systems of equations (at Khan Academy)

Chapter 8: Bivariate Data

Data and modeling (at Khan Academy)

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