Wikipedia Mobile

Maybe not a reliable source to base your uni work on – but if you just want to get an overview or learn a little bit more about a topic it could help get you started. Then go onto more academic sources for your real research.

iTunes U

A large library of free video and audio podcasts, books and documents created by academics across the world. Browse the catalog and download to your library.

Khan Academy

Over 3,500 videos on many topics. Well populated maths section – from basic to advanced. Puzzles, quizes, tests, notes – you might find topics to help your younger sisters and brothers as well as yourself in here.