http://www.englishclub.com/join/ (comment about teaching blog online number 1)

This is a teaching blog ouitline where we can register in a free way.They send weekly by e-mail :lesson,games,different articles and tips for learning English.Also,we can find forums,chat and we can have an own page with videos,photos,music,blogs for improving our English.I think that is a complete blog which can be used for teachers and students