I have a tablet (transformer prime) that has a real keyboard that attaches and turns it into something like a netbook. It also comes with word, ppt, and excel on the tablet, for free. i love my tablet.... But take it from me, I wish I had bought a lightweight laptop instead. My husband was deployed last year and i had no computer, whatsoever. We have several programs we use that we have to use a computer for, like for concept maps and some of our tests are on the computer so we have special browsers we use. Sometimes I'm up until 2 am working on these things so going somewhere like the library to do these isn't really possible. If you will still have access to a computer in your home, then a tablet is a great idea BC of the versatility. If not, I suggest a laptop.
I also wanted to add, my school REQUIRES you to have a laptop.