M$ UK has a large website dedicated to flogging their "licences" to the education sector:
http://www.microsoft.com/uk/education/schools/software-licensing/licences-fo...
Arguably, of course, Microsoft has been complicit in the wrecking of computing in schools.
Businesses tend to use M$ Office - and have made noises about wanting school leavers to be already able to use the damned thing (as if it is difficult, or something). Schools have complied - and M$ has graciously flogged them licenses at a "special rate" - as if they are doing them a favour.
Its all crazy, since by the time kids leave school, business computing will have changed yet again.
Have a read of:
http://www.computingatschool.org.uk/data/uploads/ComputingCurric.pdf
David