If you're looking for Teacher Resource Exchange,
I closed it (it never really reached critical mass).
A couple alternate resources include:
- Open Educational Resources Commons: http://www.oercommons.org/. Linking You to Teaching and Learning Resources
Welcome to OER Commons, a global teaching and learning network of free-to-use resources – from K-12 lesson plans to college courseware – for you to use, tag, rate, and review.
- Teacher Resource Exchange (UK): http://tre.ngfl.gov.uk/. The Teacher Resource Exchange (TRE) is a moderated database of resources and activities created by teachers. All resources on the TRE are checked by subject specialists to ensure they are of the highest possible quality.