Before you invest in and unpack your iPads... check out this link on iPadeducators.ning.com for some very thoughtful questions to consider and answer as many as apply to you.
Tony Vincent's Learning in Hand site has a good round up of Classroom Do's and Don'ts to follow.
Straight from the source, Apple's Education IT Resources page is full of all sorts of helpful information and has this handy ios5 deployment guide. It's a bit techy but you can pass it to your tech support at school unless you're it!
If you're starting with one iPad, don't despair- I had one, then six, eleven and finally a class set. This blog has great info for the one iPad classroom. It is best to set up your account properly though to make it easier when you get more.
Above photo by