Khan Academy
Official SAT practice tests, AP test prep, and what you need to get through high school classes. No library card required!
Open Culture
Open Culture brings together high-quality cultural & educational media for the worldwide lifelong learning community. No library card required!
SparkNotes
SparkNotes is a resource you can turn to when you're confuzzled. This resource will help you understand books, write papers, and study for tests. No library card required!