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A framework for building exercises to work with Khan Academy.
HTML JavaScript CSS Python Shell Makefile
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build Add a bunch of eslint-disable comments for legacy code.
css Ensures that the "Show scratchpad" button works
exercises Add more specific types to fix 2 exercises on mobile
fonts Move all answer area content to the bottom of the question area
genfiles Remove references to `USERNAME`
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local-only Upgrade katex in to v0.2.0
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.arcconfig Fix the Show Answers button when reporting an exercise issue.
.arclint Fix the regexp for arc lint to correctly only match a single line.
.gitignore Fixed a few TODOs.
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exercises-stub.js Add a bunch of eslint-disable comments for legacy code.
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interface.js Add a bunch of eslint-disable comments for legacy code.
khan-exercise.js Add a bunch of eslint-disable comments for legacy code.
lint_blacklist.txt Add MathZoom.js to MathJax for real
main.js Use requirejs for module loading
package.json Rewrite pack.rb in javascript, to remove the main ruby dep on our cod…
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Khan Academy Exercises

Copyright (c) 2014 Khan Academy

The exercise framework is MIT licensed.

The exercises are under a Creative Commons by-nc-sa license.

Exercise Framework

Khan Academy has created a generic framework for building exercises. This framework, together with the exercises themselves, can be used completely independently of the Khan Academy application.

The framework exists in two components:

  • An HTML markup for specifying exercises.
  • A jQuery plugin for generating a usable, interactive, exercise from the HTML markup.

Using the Framework Locally

You need to serve the files from some sort of a server. You can't just open the files directly in a browser. For example:

cd khan-exercises
python -m SimpleHTTPServer # or python3 -m http.server

Now if you open your browser to http://localhost:8000 (or you should see the contents of the khan-exercises directory. Navigate to the exercises subfolder, and an HTML file under there to see an exercise.

Exercise Development

This framework supports over 450 of our current math exercises including updated versions of many exercises Sal built for his cousins before he made his first video! New exercises on Khan Academy, however, are now written by many content experts using Perseus and stored in our datastore as individual questions.


If you're passionate about providing a free world-class education for anyone, anywhere and want to apply to be a full-time or intern software developer at Khan Academy, please do so.

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