The NSW Department of Education and Training have some great resources on their ‘Teaching for Sustainability’ website.
The pages (see left menu) include teaching resources, learning objects and research.
Check out the ‘Focus Areas’ page —http://www.curriculumsupport.education.nsw.gov.au/env_ed/teaching/focus/index.htm
One of our favourites is the page with ‘Purchasing and Waste’ resources —http://www.curriculumsupport.education.nsw.gov.au/env_ed/teaching/focus/purchase.htm
Well worth a visit!