Jeff Anderson, author of Mechanically Inclined, offers teacher resources including a Great Sentences Blog
Great place to go for reader-friendly explanations of common usage issues
Witty podcasts by Grammar Girl offers "Quick and Dirty Tips for Better Writing"
Some free online quizzes (with immediate scoring) to check your mastery of grammar
Grammar instruction with attitude!
Power Point giving research conclusions on effective ways of teaching grammar
Always check out the Web English Teacher for support on any topic
Site supports Harry Noden's professional text called Image Grammar (see Literacy Lending Library)
Lyrics for all of the Grammar Rock songs
Two teachers who live and breathe grammar
On-line grammar games for all age groups
Sentence diagramming exercises (good background information for teachers)
Daily grammar lessons
Color-coded parts of speech lesson ideas