This is most useful to people in the UK, but BECTa, a British government agency with a lot of influence over ICT in education has come up with this after much anti-open source behaviour:
http://www.becta.org.uk/technology/infosheets/html/opensource.html
and related (as open source is far and away the most cost effective way to do it):
http://www.becta.org.uk/technology/infosheets/html/thinclient.html
Hope this helps people.
Regards
Chris Puttick
IT Manager
Central Manchester City Learning Centre