Buy a memory upgrade for one student computer (Netbook or older MacBook).  Doubling the memory from 1GB to 2GB will give these student computers the performance boost to last another 2 years in the field.  Please help us extend the useful life of these computers that are used by students daily in classes all over the school.  Replacing the computers less frequently is not only fiscally responsible, but also works towards the school's mission of environmental sustainability!