Comment Interactive whiteboards (Score 1) 411
For the average student a PC is generally a distraction. English, Maths, Biology, Physics, Chemistry, French are all subjects where 99% of the time a student should not be using a PC. However, the teacher will very often make great use of it. Plus for the price of one computer lab you can fit out 10 classrooms with an interactive white board. At my school currently I'd say it's the only piece of hardware that really makes a diffference day to day.
NOTE!
Do not make teachers log in, a teacher logging in is a teacher and their class full of bored teenagers waiting five minutes for your non-existant personal settings to load. Give the teachers a memory stick that gets backed up every night. Ban students from using these computers.