RACHEL can be installed on any device. Please visit our RACHEL page to see more info. We also "sell" units at no-profit for those who cannot complete the download in the RACHEL store. We're a small group and this is difficult to fulfil, please try yourself first.
This quick guide describes how to get and use a RACHEL server, the self-contained package to run on Windows computers (For the instructions for the Raspberry Pi version go to the RACHEL-Pi site). Updated version of this guide is finishing up here.
You'll need a 32 or 64 GB USB Flash Drive (you may already have one, or many of them.., so in this case just skip this step..) to write to it the RACHEL-Stick package content. If you need to buy one try to get one with a fast read speed. There are lots of brands and prices, but a name brand is always strongly recommended. Also, usually the cheapest ones are very slow.
The RACHEL-USB content fits on 32 or 64 GB flash drives (depending on which version you're downloading), but of course you can copy it to a larger capacity one, on any other external storage type.
BitTorrent Sync is now available for better reliability and consistency of download. Please consider familiarizing yourself with BitTorrent Sync. We do not support FTP downloads for all versions.
|Version||Language||BitTorrent Sync Code|
|RACHEL 32GB USB||English||B53DMKXKTZUG3YBKNI4NVQ3O4FZ6DPSU2|
|RACHEL 64GB USB||English||Coming Soon|
|RACHEL (ESP) 32GB USB||Espanol||B7PHH5I2NVLZY5GZJ7VAOMMFH65OGSRM7|
|RACHEL (MICRONESIA) 64GB USB||Chuuk (CONTENT ONLY)||Coming Soon|
You can skip to section 4 if using BitTorrent Sync as you will not need to unzip any files. This download may take days. It is only complete when the file ends in ".img" and not !SYNC. !SYNC is an incomplete download. Contact us if you need help.
The whole RACHEL content is alternatively packaged and compressed in just one file to download. The file is in the .zip format.You are going to download it by FTP:
A very good and free FTP client for Windows, Mac and Linux is FileZilla ( filezilla-project.org). It has very important features (Keep-alive, auto reconnect) for downloading very large files like this.
Sample FTP login using FileZilla:
Once connected you'll see the files in the server available for FTP download. Go to the "rachel" folder and drag the rachel_wamp_20131007.zip file to a folder in your computer. Example using FileZilla:
The FTP download will start.
WARNING: These are very large files, which may take a long time to download.
Important: if you want to verify the integrity of the very large downloaded file, which is strongly recommended to make sure that it has arrived intact during the long download process, this is its md5 checksum: 7dc8665b78af274442cb2a1c0d49ba3f
To verify the MD5 checksum of the downloaded file you can use in Windows a free tool like WinMD5Free (www.winmd5.com). Sample screenshot:
After downloading the large package file to your computer you have to unpack it, with a tool like 7-Zip or WinZip on Windows. 7-Zip is a great tool, open-source and free (www.7-zip.org).
As an example, here are screenshots from 7-Zip on Windows selecting and unpacking the large zip file:
As it is a very large file the above step may take a very long time, even hours in some cases.
When the whole extraction of the zip file is completed, you will end up with the whole structure of the RACHEL package on your local computer.
Plug a 32 GB USB flash drive (stick), or other external storage device with enough capacity, into a USB port in your computer. In Windows this will show up as a new drive letter (like E: or D: ) in Windows Explorer.
Using Windows Explorer, select and drag the new downloaded content, from the location where you extracted it to in the previous step, to the USB flash drive. This will make a copy of the all the RACHEL content on the USB memory stick, that you can use to take or ship anywhere. This copy operation may take a long time also, as there are lots of files to copy.
Before you begin with either scenario, please be aware RACHEL will not function with a VOIP service running on your computer (Skype, Vonage). Also RACHEL requires a modern web browser.
Let's review in detail those scenarios below
In this scenario a person plugs the RACHEL USB drive to a personal computer and with Windows Explorer goes to the location of the just plugged drive, like D: in this example:
The above screenshot shows the directory structure of the RACHEL package.
To start the RACHEL server just double click on RACHEL-START.exe, which will open the mowes window in your desktop, as in here:
The server will also at this point automatically launch the default web browser in the PC, connecting to the now running web server in it, and launching in the browser the RACHEL content:
From there the student can navigate the different content libraries that are part of a RACHEL server.
Or you can just you a phone connected to the same wi-fi network created by the wireless router and use a mobile app to scan the local network and find out the connected computers . Just see the details of the device with the name of the computer you are running RACHEL. Make note of the IP address, 192.168.0.102 in this example. (Using the Scany iPhone app for this screenshot on the right).
Once you have have downloaded the RACHEL package, based on your on-the-ground needs, there are other ways the RACHEL content can be used. Here are just some examples:
This will launch the PC default browser and automatically load the RACHEL main page.
The "Khan Academy on a Stick" content included in RACHEL, with about 3,000 video lectures, uses HTML 5 video in mp4 format using H.264 video and AAC audio codecs. So to be able to play these videos you need to use a modern HTML 5 compatible browser version that also supports this video format.
You can see a list of supported browsers here The ones under the H.264 column and highlighted in Green are very likely to play fine the videos in this distribution.
For instance, as per today, Windows Internet Explorer 9+ and Chrome work great. Latest versions of Firefox (22+) for Mac and Windows work fine also. On the Mac, Safari, Chrome and Firefox 22+. On iOS devices (iPads, iPhones, iPod Touch) everything plays great with OS Safari: the videos can also be expanded full screen, rotated, etc. On Linux Chrome and Konqueror, on Android, well, it is a long story.., but please try yourself (there are at this time thousands of combinations of hardware-Android software versions out there. On some quality ones they play great for instance with Firefox for Android.)
Other pieces of content part of RACHEL include Flash animations, which will be played as well by the above browsers. Though those Flash animations won't play on iOS devices (iPads, iPhones) as Apple does not support Adobe Flash on iOS.
Please do not hesitate to contact us should you have problems to download, expand or use RACHEL. You can contact us as described in the About page and we'll be happy to respond.