Ok, just imagine if your iBook get stolen. Can you imagine? to pay for it?
I'm not really sure if having a prtable computer in school is gonna help you with better grades, I really do not think so. It will help the software piracy for sure, specially games.
Lets see what happen.
I studied multimedia in a school with hundreds of SGI machines and all I could do after the school was Photoshop... so, a $22.000 year tuition to end up working with Photoshop? Too much technology, not much usefull education.