I have had an interesting Proposal put to me to consider. I have been approached to think about putting Linux in a school to replace their existing Windows based systems. The exact nature of just how much replacing will be done I don't know just yet, but I am seeing this as being a great opportunity to take on an exciting and interesting project.
You miss out one important piece of information: do you mean computers which the school staff use for admin purposes, or computers which the pupils use? Or both? I have no experience, so I defer you to others; the only tip I can offer is a common sense one: start off with one or two computers, then progress from there. I doubt you needed telling that... :) -- 9:45am up 10 days, 1:59, 1 user, load average: 0.00, 0.00, 0.00