See http://www.k12opened.com/about for links and more resources. Open educational resources (OER) are tremendous resources, but are unknown and untapped by many. These free and open resources, published under licenses like Creative Commons, can be used in the classroom to differentiate instruction and increase equity. This presentation begins with an overview of copyright and how open content can help teachers and students comply with copyright law. We’ll then look at sites for open-licensed clip art, photos, music, sound effects, and video that can be used to create podcasts, multimedia presentations, web sites, and online courses. Finally, we’ll explore collections of lesson plans, textbooks, and online courses that can be used across the curriculum, from early elementary to AP high school.