khan-exercises

A (deprecated) framework for building exercises to work with Khan Academy.

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REPOSITORY AT A GLANCE

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What it is

A (deprecated) framework for building exercises to work with Khan Academy.

GitHub

Where it is used

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khan/perseus · linked in 2 of the same discussions

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This week on Hacker News

Nov 8–Nov 15 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/15/2026, 9:28:18 AM UTC.

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Mentions over time

HN mentions by year37 dated mentions

Observed mentions: 2011-06-22 02:16:06 UTC to 2016-04-07 21:31:38 UTC.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

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Period	Start (UTC)	End (exclusive, UTC)	Mentions	Submissions	Comments
2011	2011-01-01 00:00:00 UTC	2012-01-01 00:00:00 UTC	15	1	14
2012	2012-01-01 00:00:00 UTC	2013-01-01 00:00:00 UTC	14	0	14
2013	2013-01-01 00:00:00 UTC	2014-01-01 00:00:00 UTC	6	0	6
2014	2014-01-01 00:00:00 UTC	2015-01-01 00:00:00 UTC	0	0	0
2015	2015-01-01 00:00:00 UTC	2016-01-01 00:00:00 UTC	1	0	1
2016	2016-01-01 00:00:00 UTC	2017-01-01 00:00:00 UTC	1	0	1

From the project README

An excerpt from the repository, fetched Nov 13, 2026.

Read the project’s introduction

Khan Academy Exercises 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. This repo consists of two parts: Various HTML files that describe exercises. A jQuery plugin for generating a usable, interactive, exercise from any of the HTML files. Current Status Khan Exercises is no longer used for development of new exercises at Khan Academy. We're always looking to improve the exercises that are currently built with Khan Exercises, but at this time we don't intend to add any new exercises. New exercises on Khan Academy are written by many content experts using Perseus and stored in our datastore as individual questions. The bulk of our bug reports now go into Zen Desk where volunteers surface issues to KA developers, but we still process issues and PRs that come in through this repository. The goal is to keep high-quality bug reports and feature requests in this repository so awesome OSS developers who want to help KA have the tools do so. If you're looking to contribute time, looking through our wiki is a good place to start. Questions should go into the issue tracker (we may set up gitter if there ends up being a high volume of questions). Licensing Copyright (c) 2015 Khan Academy The exercise framework is MIT licensed. The exercises are under a Creative Commons by-nc-sa license. 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 http://127.0.0.1:8000/) 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. More 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.

Read the full README on GitHub

What Hacker News says

1 sources

ariabuckles·Oct 21, 2015

1. If you're not passing the backbone models to React components, this sounds fine. backbone models as props ends up being really painful because of how mutable they are, and when we tried to manage that with mixins, it was buggy and caused problems (note: I'm not familiar with the actual mixin we used there and whether there was a better way to do it). Since most flux implementations are pretty stateful/mutable themselves, using mutable backbone models there, so long as you copy data out to pass to react views, seems safe. Though I'm excited long-term about the immutable flux implementations (https://github.com/rackt/redux) 2. We had a library originally written by Ben Alpert (now core react team) that handles all of our interactive svgs [1]. Since KA has a lot of legacy code there, and there hasn't been an immediate benefit to porting i

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t (which would take a pretty significant time investment, on the [very roughly] order of a couple dev-months), this is still mutable jQuery/raphael code. There have been a lot of talks of eventually porting this to react, but the immediate need for it hasn't been there yet. However, I did write a React wrapper around much of this code which is used by newer interactive widgets [2]. [1]: https://github.com/Khan/khan-exercises/blob/master/utils/gra... [2]: https://github.com/Khan/perseus/blob/master/src/components/g...

In Khan Academy's React style guide