Skip the classroom and continue your education from your couch! If your residents have the knack to keep learning, and would love to do it from the comfort of their home, introduce them to online classes. Massive Open Online Courses (MOOCs) are free online courses available for anyone to take. They provide an affordable and flexible way to learn new skills. Also, visit the Khan Academy and sign up for access to free online course, or if you're looking for something a little more informal...check out these free online courses.
Check out the original idea here.