Links:
[1] http://www.edutopia.org/sara-ring
[2] http://www.edutopia.org/environmentally-conscious-lesson-ideas
[3] http://www.epa.state.il.us/p2/green-schools/green-schools-checklist.pdf
[4] http://www.epa.gov/teachers/
[5] http://www.nytimes.com/2007/10/25/education/25green.html?fta=y