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Free Online Classes & Video Tutorials

A growing number of videos, exercises and lesson plans for self-paced learning.

Featured Video Lessons

Economics

1. Why Finance?

SAT Prep

Solving quadratic equations Basic example

Watch Sal work through a basic Solving quadratic equations problem.

Math

Perimeter and Area Basics

Definitions of perimeter and area

SAT Prep

Overview of the official SAT practice

Information about the Official SAT Practice.

Math

Basic Addition

Introduction to addition. Multiple visual ways to represent addition

Math

The Beauty of Algebra

Why the abstraction of mathematics is so fundamental

California Standards Test

California Standards Test

Practice problems for California Standards Tests.

1 course • 16 videos

Algebra I

16 videos

Economics

Economics

Financial theory and economics lectures from Yale.

1 course • 26 videos

Financial Theory with John Geanakoplos - Yale

26 videos

History

History

Learn about world history, U.S. history, and historical events.

1 course • 16 videos

Khan Academy: History of the World

16 videos

Math

Math

Free math tutorials from arithmetic through calculus.

7 courses • 154 videos

Algebra: Introduction to Algebra

4 videos

Algebra: Solving Linear Equations

60 videos

Arithmetic and Pre-Algebra: Addition and Subtraction

16 videos

Arithmetic and Pre-Algebra: Multiplication and Division

26 videos

Geometry: Angles

35 videos

Geometry: Basic Geometry

8 videos

View all 7 courses in Math →
SAT Prep

SAT Prep

Prepare for the SAT with practice problems and tutorials.

6 courses • 129 videos

About the SAT

5 videos

Additional Topics in Math

15 videos

Heart of Algebra

18 videos

Passport to Advanced Math

28 videos

Problem Solving & Data Analysis

20 videos

Reading & Writing

43 videos

Science

Science

Explore biology, chemistry, physics and more.

1 course • 14 videos

Khan Academy: Biology

14 videos

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