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A framework for building exercises to work with Khan Academy.
HTML JavaScript CSS Python Other

Allow parameterizing request timeout

On mobile, 30s is too long of a timeout. We wish to fail faster.

Needed for

Test Plan:
Copy interface.js to Resources/webview/ThirdParty/khan-exercises/interface.js in the iOS repository.
Attempt an exercise. Assert that the number of pending requests increments to 1, then decrements to 0.
Open Safari. Under iOS Simulator, open the console for exercise-view.html.
Assert that Exercises.requestTimeoutMillis is accessible and assignable.

Reviewers: benkomalo

Reviewed By: benkomalo

Subscribers: david, andy

Differential Revision:
latest commit 696faf924e
@mgp mgp authored
Failed to load latest commit information.
build Change khan-exercises to use /api/internal everywhere
css Prevent issue form labels from appearing on a new line after their re…
exercises Change word polynomial to binomial
fonts Move all answer area content to the bottom of the question area
genfiles Remove references to `USERNAME`
images Update badge images and fix clipping
local-only Upgrade katex in to v0.2.0
test Tests: Make tests run again
third_party Use webpack to bundle JS together, not requirejs
tools Add tools/, which will be automatically run by khan-linter.
utils Don't remove dummy points/lines when calling removeAllTools
.arcconfig update .arcconfig to https
.gitignore Fixed a few TODOs.
.gitmodules Move qunit to a more-global directory
.travis.yml Try a different room ID!
Gemfile Fixed a few TODOs.
Makefile Fixed a few TODOs. Link to careers page, not Jobvite
exercises-stub.js (khan-exercises) Replace top-level var declaration with explicit glob…
history.js Fix coach report answer correctness color
interface.js Allow parameterizing request timeout
khan-exercise.js Fix up navigability of exercise hints. Fixes T3680.
lint_blacklist.txt Use webpack to bundle JS together, not requirejs
main.js Use requirejs for module loading
package.json Fixed a few TODOs.
requirements.txt First pass at creating a new script for our i18n e…

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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