Ruby and Programming Beginners Class (Level 1)
It will help you immensely to have installed Ruby on your machine. The best way to do this on a Windows machine is to use RailsInstaller, and on a Mac OSX machine is to use RVM (though if you're not doing serious Ruby or Rails development yet, you can use RailsInstaller on the Mac too.) Note that RailsInstaller installs Ruby 1.9, but for the purpose of this class, that's good enough.
Please contact the instructors via team [at] railsschool.org if you are having trouble using either of these. In general, a clean install is recommended if you run into trouble; on Windows, if you already have Cygwin Ruby installed, it's seriously recommended that you uninstall it.