Bob said:
Check the Microsoft Press on the Microsoft website. Usually you can
get the books at Barnes & Nobel locally or amazon.com by mail order.
You might consider Win2K instead of XP because it is cheaper and it
has been around a lot longer. There are some very good books on Win2K.
Call Microsoft and ask them to donate the software to the school.
Stay away from Microsoft. Anything there will simply be a ploy to
entangle more people in their web. You can get everything you
need, without any hassles about licensing, and much more reliable
performance, from a Linux installation. There are many available
packages. They won't be hidden from you, and they won't require
allowing Microsoft snooping rights into everything you do.
Lots of books available, and their authors don't have to guess,
because they can actually look at the software they are writing
about. What they write will remain valid for the immediate future,
while anything about Microsofts stuff is liable to be dropped
tomorrow.