ESL/EFL Educational Materials In our Education section, we present a creative, varied collection of resources for students of English and other foreign languages, including textbooks, graded readers, and self-study guides. For teachers, we offer professional development resources, collections of classroom activities, and short, affordable guides on how to teach different aspects of English as a second or foreign language. Books are available in paperback, digital (ebook), and audio. Not all books are available in all formats, however. Check each book page for more information.