The solution: just use fucking books.
Yes, they're heavy and a pain to drag around, but do you seriously have a better idea? They're infinitely versatile and aren't scared of getting tossed around.
iPads as an educational tool has to be the most ridiculous attempt yet at "digitalizing" education.
There's a little-known Steve Jobs video (http://www.youtube.com/watch?v=Q82weiAJmaA) where he says that computers and technology are absolutely no substitute for an environment that promotes curiosity and a thirst to learn.
Also, books don't cause eyestrain, they have insanely fast refresh rates, and you can flip to any one section quickly and easily without tearing your eyes out.