This document provides an overview of copyright law as it relates to educational use of materials. It defines key concepts like public domain, orphan works, and fair use. It notes that while some assume everything online is free to use, copyright still applies. Fair use allows limited use of copyrighted works without permission if the use is fair, reasonable, and does not impair the value or profits of the original. The document outlines the 4 factors considered for fair use and discusses licenses and permission. It provides resources for determining if permission is needed and how to obtain it.