The only advice I can give its DONT RUSH IT
It sounds silly me saying this, but we have teacher laptops, and no desktops for the teachers to use in their classrooms
The teacher take home the laptops play around install stuff there self play on facebook and completely brake them.. its maybe worth keeping the desktops there as this is what I have experienced
If you do go ahead with it keep the hard drives!!! Just in case the teacher turns around and says ďbut I had it in my C driveĒ
Make sure (if its xp) you install SP3 BEFORE IE8 or 9 (If you ever uninstall you IE to an earlier one you will not be able to use the search engine)
And install as much as you can... (again sounds silly) you donít want the teacher coming to you after 3 weeks and saying that they have this list of things that need to be on there.
I have only been a Technician for about 3 years all in all... and I know that teacher laptops are the future, all im trying to say is donít rush it