This solution will be, perhaps, unpopular. However, if your school won't allow electronics, but you're looking for something to fill your time while traveling, why not read a book? I have a two-hour commute to and from work each day, and have for the past five years. I've read a LOT of really good books in that time ... and I can still listen to music elsewhere whenever I want.
The last book I finished, and one that was a relatively easy read while still being engaging, was [ame="http://www.amazon.com/Soon-Will-Be-Invincible-Novel/dp/0375424865"]Soon I Will Be Invincible[/ame], and it could easily keep you busy for a few days while commuting.