I’m exploring a similar application for a public middle school, special education class (EBD, emotional and behavioral disorders). My wife teaches the class and is also techno-challenged. I’m a software developer. Aside from a problem with version 3.0 that’s nearing resolution, RACHEL is practically plug and play. Do you already have a device?
Jeremy’s overview is a good place to start.
The more critical question for you is: how will you use RACHEL? Are your students institutionalized? How old are they? How will they connect to the device? What sort of computer will they use, Windows laptop, desktop, Chromebook or something else? How old are these computers and what operating system do they use? What version of the operating system? Will each student have a personal computer, or will they share computers in a lab? Will they be self-directed, strictly in a classroom setting with a common curriculum or some combination thereof? Will they have extended access to the device or only limited time each day? Do you have specific content requirements, like middle school Earth Science or high school algebra or practical skills like typing?
I’m in Georgia, near UGA in Athens. Where are you?