[MENTION=360]prplchknz[/MENTION]
Ok...just going to throw this out there because it's what I have...
The tablet I use is a 16GB Nexus 7 (
$220) in conjunction with a Finite cover + stand (
$7) and a cheap Motorola bluetooth keyboard (
$14 used). During class periods, I honestly prefer to write my notes on paper, but I regularly do homework and view PDF files of textbooks on my tablet. Typing long documents is also a breeze with a full-size keyboard. I think it's a really great way to do schoolwork on the go, but certain projects seem to require the use of a desktop/laptop. Plus, the Nexus 7 is relatively well-optimized, meaning it can play a ton of fun games on the Play Store.

In all, I think it's a relatively good deal.
Unfortunately, netbooks seem to have fallen out of style. I remember a while ago I really wanted one, but there just don't seem to be as many anymore. Perhaps you might want to look into Chromebooks. They seem to be a bit cheaper than your average laptop, but they have greatly reduced functionality.
My recommendations if you decide on a tablet:
1. If you want to hand-write notes on your tablet, go for a 10'' one. 7'' is too small for writing. If you just want to type, 7'' is perfectly fine.
2. Get a full-size keyboard, not a small one that is built into a case. Anything smaller than a full-size will be too cramped to comfortably type on. Bluetooth keyboards tend to be expensive, but if you look around, you can find some cheaper stuff. I'd recommend that cheap Motorola one I linked to.
3. Be aware that (on inexpensive tablets at least) you can't have multiple windows open at once like on Windows. In most cases, you'll probably be fine. However, if you are trying to do some sort of project that requires research, switching back and forth between apps every second will become
very frustrating. A desktop/laptop is needed for that kind of multitasking.
****4. Use
Google Drive (free cloud service)! This is actually a recommendation whether or not you decide to use a tablet. Whenever I am writing an assignment, I make it in Google Drive first before formatting it properly in Word or whatever. That way, I always have a backup copy in case my laptop/tablet/whatever spontaneously combusts. It is a lifesaver. (The downfall of Google Drive is that you can't edit your PowerPoints on a tablet. You need a separate app for this.)