What is RACHEL?

RACHEL is a system for distributing educational content to areas with limited or no internet connectivity. This USB version of RACHEL is best for installing directly on individual computers. RACHEL is also available as a server with WIFI hotspot for sharing in classrooms or other educational environments. All our code is open-source so you can build your own server. Or you can purchase a preconfigured system from our non-profit store. All proceeds from sales go back into developing and distributing RACHEL.

Who makes RACHEL?

RACHEL is produced and distributed by the non-profit organization World Possible. The content is curated from numerous sources around the web. Development is open to volunteers.

What browsers can be used with RACHEL?

Full use of RACHEL requires an HTML 5 compatible browser that support the mp4 format (H.264 video and AAC audio). These are examples of supported browsers for this version: Internet Explorer 9+ (on Windows, Windows Phone and Windows RT), Google Chrome 3+ (for Windows or Mac), Safari (for Mac or iOS 3.5+), Android 3+. Firefox 22+ (for Windows, MacOS, Linux), Firefox for Android 4.1 (Jelly Bean) and Samsung phones and tablets with Android 4.0 (Ice Cream Sandwich).
As web browsers continuously evolve, this table online shows which video formats are likely to be supported by a given browser.

Is the RACHEL content under any license?

Yes. This RACHEL distribution is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. You can use and distribute this offline version except for any commercial purpose, like selling it in any way. You can only distribute it for free, and you must keep the attribution and the "About" section (about.html).

The educational content made available offline in RACHEL is owned by their own creators:

All Wikipedia content is available for free at www.wikipedia.org.
All Khan Academy content is available for free at www.khanacademy.org.
All CK-12 content is available for free at www.ck-12.org.
All MedLine content is available for free at www.nlm.nih.gov/medlineplus/.
All Hesperian content is available for free at www.hesperian.org.
All Gutenberg content is available for free at www.gutenberg.org.
All OLPC content is available for free at www.laptop.org.
All MIT Scratch content is available for free at scratch.mit.edu.
All UNESCO's IICBA content is available for free at www.eng.unesco-iicba.org.
All Math Expression content is available for free at www.mathexpression.com.
All Music Theory content is available for free at www.musictheory.net.