MERLOT

This site allows educators and others to build a variety of classroom materials in all of the following formats; "e-portfolio, lesson plans, pedagogical analysis, student reflection, online course, tutorial, presentation, community website, etc." free of charge by logging on at:
http://www.merlot.org/merlot/index.htm
The user of this site employs Content Builder software to develop materials. They are licenced through Creative Commons and made public through MERLOT. One of the best sources I found for English Education material was:
http://grammar.ccc.commnet.edu/grammar/index.htm
This site is linked by thousands of schools and universities and has received nearly 80 awards. It links a huge array of writing and grammatical resources. Open source material such as that offered by MERLOT opens a world of tools and resources to teachers. The internet has already expanded teachers' available resources far beyond their textbook and local library but this site provides the ability to be part of a lesson plan creation community.