"The school ones have the least amount of memory possible and can only run basic word processor programs. You try and load Microsoft powerpoint and it runs out of memory and freezes."
Dinker, do PC's run good with inadaquate RAM
After that comment, I doubt the Macs at your school are properly maintained. That could explain why they 'go out' all the time.
A computer is only as good as the people that maintain it.
Its just the opposite at my work. We are a Mac house with Mac servers & Mac workstations and most important, a Mac tech. Those things are souped out and maintained well. They are incredibly reliable and powerful. We have 3 PCs that don't get tended to. They are shit-boxes that get barely muster enough strengh to run the OS.