St. Mary's Academy
Research
Internet School Library Media Center
SCREENIT.COM -- very detailed movie reviews for parents, to help them determine which movies to go to or rent with their children.
SparkNotes.com -- Study guides for literature, astronomy, poetry, history, biology, biography, computer science, Shakespeare, philosophy, economics, mathematics, chemistry, physics, psychology, and health and nutrition. Also has message boards for each subject. Great for background information on topics you're teaching.