prepare for the ap exams. access ap exam overviews, as well as ap exam information, ap practice tests and ap study books for ap students.

We support teachers with professional development and lesson plans, AP students with free high-quality resources and schools with our signature grading service.

The Penguin Publishing Group is the proud publisher of great writers and gifted storytellers, beloved books and eminent works. At Penguin, we believe that literature can fuel the imagination and guide the soul. There’s a book on our shelves for every reader, and we relish the opportunity to publish across every category and interest with the utmost care and enthusiasm.

internet archive is a non-profit digital library offering free universal access to texts, movies & music, as well as 624 billion archived web pages.

Discover and share books you love on Goodreads, the world's largest site for readers and book recommendations!

Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.

High School Test Prep features hundreds of free practice questions. Online testing for the ACT, SAT, PSAT, and AP exams.

studocu provides access to millions of study materials shared by university and high school students from over 60 countries. join the community today!