Learning Resources by

Khan Academy

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Resources

Free

Gastrointestinal system physiology

Anatomy & Physiology
College | Online class

Do you live to eat, or eat to live? Folks fall on both sides of this question, but who can deny the powerful role that food and water play in our everyday lives. If we were cars, food and water...

Free

GDP: Measuring national income

Online class

Economics can some times get confusing because one person’s expenditure is another person’s income which can then be used for expenditure and on and on and on. Seems very circular. It is. This...

Free

Gene regulation

Genetics
College | Online class

You have tens of thousands of genes in your genome. Does that mean your cells express all of those genes, all the time? Not by a long shot! Even an organism as simple as a bacterium must carefully...

Free

Geometric constructions

Online class

With just a compass and a straightedge (or virtual versions of them), you’ll be amazed by how many geometric shapes you can construct perfectly. This tutorial gets you started with the building...

Free

Geometric optics

Online class

In these videos and articles you’ll learn how to determine the angle of reflected light and the definition of specular and diffuse reflection. You’ll also learn how to use Snell’s law to determine...

Free

Geometry

Geometry
4th - High School | Online class

Roughly 2400 years ago, Euclid of Alexandria wrote Elements which served as the world’s geometry textbook until recently. Studied by Abraham Lincoln in order to sharpen his mind and truly...

Free

Geometry

Geometry
5th - 7th | Online class

Learn how to find the area, volume, and surface area of all sorts of geometric shapes. Also work with shapes on the coordinate plane.

Free

Geometry

Geometry
Kindergarten - 2nd | Online class

Learn how different shapes have different numbers of corners, different side lengths, and so on. Use these properties to help you recognize shapes.

Free

Geometry

Geometry
3rd - 6th | Online class

Let’s draw points, lines, line segments, and rays. We’ll also think about perpendicular and parallel lines and identify these in two-dimensional figures. Common Core Standard: 4.G.A.1

Free

Geometry

Geometry
4th - 6th | Online class

We’re going to stick our toes into the proverbial waters of geometry! For those of you that are visual learners you’ll love this topic. We’ll examine all kinds of lines and shapes in the 1st, 2nd,...

Free

Geometry

Geometry
7th - 9th | Online class

Welcome. I’d like to introduce you to Mr. Angle. Nice to meet you. So nice to meet you. This tutorial introduces us to angles. It includes how we measure them, how angles relate to each other and...

Free

Global contemporary: 1980-present

Contemporary Art
College | Online class

Global contemporary art is characterized by a transcendence of traditional conceptions of art and is supported by technological developments and global awareness. Digital technology in particular...

Free

Global modernisms in the 21st century

Online class

Culture, like capitalism, is increasingly global. Artists work internationally and no single city is now the center of the art world. Istanbul, Beijing, Bogotá, Beirut, Lagos, and São Paulo all...

Free

Global prehistory: 30,000-500 B.C.E.

History
7th - College | Online class

Human expression existed across the globe before the written record. While prehistoric art of Europe has been the focus of many introductions to the history of art, very early art is found...

Free

GMAT

GMAT Preparation
College | Online class

Sal works through the 249 problem solving questions in chapter 5 of the the 11th edition of the official GMAC GMAT Review (ISBN Number: 0-9765709-0-4 published in 2005)

Free

Grammar

Grammar
1st - 5th | Online class

Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there’s something here for everyone.

Free

Graphing lines and slope

Graphs
7th - College | Online class

How can we communicate exactly where something is in two dimensions? Who was this Descartes character? In this tutorial, we cover the basics of the coordinate plane. We then delve into graphing...

Free

Graphs of trigonometric functions

Trigonometry
High School - College | Online class

Sal draws the graph of the tangent function based on the unit circle definition of the function.

Free

Greek art

Art History
High School - College | Online class

Rio 2016, London 2012, Beijing 2008, Olympia 776 B.C.E. find out how the ancient pan-Hellenic games inspired our modern Olympiad. Then learn to identify the classical orders and you will never look...

Free

Green's, Stokes', and the divergence theorems

Online class

Green’s theorem (videos) It is sometimes easier to take a double integral (a particular double integral as we’ll see) over a region and sometimes easier to take a line integral around the boundary....

Free

Health and medicine

Anatomy & Physiology
High School - College | Online class

No organ quite symbolizes love like the heart. One reason may be that your heart helps you live, by moving ~5 liters (1.3 gallons) of blood through almost 100,000 kilometers (62,000 miles) of blood...

Free

Hematologic system diseases

Disease
College | Online class

Blood is incredibly important in combating disease and the healing process after an injury. It acts as a highway for medicine, stops bleeding, fights infections, controls cells from multiplying too...

Free

High Renaissance in Florence and Rome

Online class

As the Humanism of the Early Renaissance develops, a problem arises. How can an artist create figures that are at once an accurate naturalistic rendering of the human body in space while also...

Free

Home-made robots

Robotics
High School - College | Online class

Mrs. Rowhani’s third graders learn about matter and energy by building a Spout bot with Khan Academy. Special thanks to: Santa Rita’s volunteer parents, Ka…

Free

Hour of Code

Computer Programming
4th - College | Online class

Learn how to program drawings using JavaScript by designing your very own snowman. Try it on your own or with your class!