Hello
depending on the location and the green area around the school.........
An ideal place for the sunmaschine
http://www.sunmachine.com/english/prod_pellets.htm ( a woodpellet burner with an stirling engine =chp unit)
And a waste water treatment plant with willows -to harvest -and produce pellets with the kids
So provide (part or all ?) heating ,hot water , electricity with an intresting technology and in-cooperate the recycling and producing ....

Sure more wood pellets are needed but ...
Billi