Grammar Review
Favorite review sites
Good, interactive site; college but often fine for high school. For run-on and fragment info, see "structural flaws."
Lists many sites about grammar (Many are worksheets, inter-active are sometimes slow.)
PowerPoint sites
Grammar Bytes includes Powerpoints and interactive lessons. (Very helpful site.)
Exercises/Practice Quizzes
Sentence Fluency Quizzes
Run-on Sentences
Run-ons high school level
More about run-on sentences - not all games work on a mac
Fluency and conventions
Grammar quizzes-some college level
(See this link for quizzes on fragments, commas, semi-colons, and colons.)