This document provides an overview of copyright and licensing as they relate to educational use of online materials. It discusses implied and express licenses, fair use, and the TEACH Act. Implied licenses have vague boundaries and don't necessarily allow commercial use without permission. Express licenses explicitly state the rights granted by the author. Fair use considers the purpose, nature, amount, and potential market effect of the use. The TEACH Act expanded educators' rights in 2002 to display and copy works for curriculum. Checklists can help determine what constitutes fair use. Creative Commons licenses materials for reuse by educators and students.