Based on U.S. National Curriculum Standards

Textbooks that
make learning easier.

Grade-by-grade Math, Science, and English books — written for how kids actually learn, and free for everyone.

Short lessons, plain language, and practice that sticks — not dense pages kids skip.

Every book matches a school year, so you always know where to start and what comes next.

Available as free ebooks in EPUB format — download, read offline, and keep forever.

Choose a subject. Pick a grade.

Open any book below to explore lessons aligned with that grade level.

Each textbook pairs with MegaCub’s adaptive lessons — so reading turns into practice, feedback, and real progress.