Learning Resources by

Khan Academy

khanacademy.org




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Resources

Free

Computer science

Computer Science
7th - College | Online class

Learn select topics from computer science – algorithms (how we solve common problems in computer science and measure the efficiency of our solutions), cryptography (how we protect secret...

Free

Conceptual and Performance art

Performance Arts
High School - College | Online class

Does art need to be a physical thing, an object made of stone or canvas? Could art be an idea enacted, a process, or an environment inhabited and transformed?

Free

Congruence

6th - High School | Online class

Two figures are congruent if you can go from one to another through some combination of translations, reflections and rotations. In this tutorial, we’ll really internalize this by working through...

Free

Conic sections

Conic Sections
8th - High School | Online class

Sal introduces the four conic sections and shows how they are derived by intersecting planes with cones in certain ways.

Free

Conjugated systems and pericyclic reactions

Online class

Molecules with conjugation can undergo some interesting and useful reactions! We will be learning about the Diels-Alder reaction, including how to predict the stereochemistry and regiochemistry of...

Free

Consumer and producer surplus

Online class

Many times, the equilibrium price is lower than the highest price some folks are willing to pay. For all consumers, this is called consumer surplus. Similarly, the price might be higher than the...

Free

Cosmology and astronomy

Astronomy
7th - College | Online class

The Earth is huge, but it is tiny compared to the Sun (which is super huge). But the Sun is tiny compared to the solar system which is tiny compared to the distance to the next star. Oh, did we...

Free

Counting

Numbers & Counting
Pre-K - 1st | Online class

Counting small numbers. Learn to count from 0 to 20. Sal counts squirrels and horses. Practice counting up to 10 objects. Learn how to count without making mistakes. Find 1 more or 1 less than a...

Free

Course materials

Online class

These syllabi and sample discussion questions are for the use of instructors who are encouraged to build on and adapt them for their own classes. They can also be used by individual learners...

Free

Critical analysis and reasoning skills practice questions

Online class

All content in “Critical analysis and reasoning skills practice questions”

Free

Current economics

Economics
High School - College | Online class

Unemployment is a key metric for judging the health of an economy (and even political stability). This tutorial is a primer on what it is and how it’s measured (which you might find surprising).

Free

Data and modeling

Online class

When we display data on scatter plots, we often see trends. Sometimes these trends are linear, meaning that the data roughly follows the path of a line.

Free

Data and statistics

Statistics & Probability
High School - College | Online class

In statistics, we try to make sense of the world by collecting, organizing, analyzing, and presenting large amounts of data. For example, you may survey your friends about what tv show is most...

Free

Data sufficiency

Online class

Sal works through the 155 data sufficiency questions in chapter 6 of the the 11th edition of the official GMAC GMAT Review (ISBN Number: 0-9765709-0-4 published in 2005)

Decimals

Decimals
6th - 9th | Online class

You’ve been using decimals all of your life. When you pay $0.75 at a vending machine, 0.75 is a decimal. When you see the ratings of gymnastics judges at the Olympics (“9.5, 9.4, 7.5 (booooo)”),...

Free

Decimals

Decimals
4th | Online class

Learn what decimal numbers are, and see how decimals are related to fractions. Along the way, find decimals on the number line, convert between fractions and decimals, and compare decimals.

Free

Decimals

Decimals
3rd - 6th | Online class

You’ve been using decimals all of your life. When you pay $0.75 at a vending machine, 0.75 is a decimal. When you see the ratings of gymnastics judges at the Olympics (“9.5, 9.4, 7.5 (booooo)”),...

Free

Derivatives of multivariable functions

Derivatives & Differential Calculus
High School - College | Online class

What does it mean to take the derivative of a function whose input lives in multiple dimensions? What about when its output is a vector? Here we go over many different ways to extend the idea of a...

Free

Descriptive statistics

Statistics & Probability
College | Online class

This is the foundational tutorial for the rest of statistics. We start thinking about how you can represent a set of numbers with one number that somehow represents the “center”. We then talk about...

Free

Differential calculus

Differential Equations
9th - College | Online class

Missions recommend what to learn next, help you remember what you’ve learned by mixing skills, and save your progress.

Free

Differential equations

Differential Equations
College | Online class

How is a differential equation different from a regular one? Well, the solution is a function (or a class of functions), not a number. How do you like me now (that is what the differential equation...

Free

Discoveries and projects

Online class

how would you know which way is north if you had no reference? Can the direction of stroke alone tell you this? Are you sure?

Free

DNA as the genetic material

Genetics
High School - College | Online class

What exactly is DNA? This seemingly simple polymer, made up of just four different types of monomers, serves as the genetic material for all living organisms. For example, your DNA provides...

Free

Doodling in Math and more

Online class

You’re feeling spirally today, and math class today is taking place in greenhouse #3…

Free

Early abstraction: Fauvism, Expressionism, and Cubism

Online class

Les Fauves (the wild beasts) used color the way most artists use line, to define form in space. From these brilliant early experiments, Henri Matisse went on to create some of the most daring and...