Led by Nancy Simms, the University of Minnesota Copyright Services has a number of pages that teach the basics of copyright, helping you answer the questions, "Can I use this?" and "What do I own?"
The Ohio State University Copyright Center, led by Sandra Enimil offers a variety of resources that give a general overview of U.S. Copyright Law as well as several that focus on the public domain.
Led by Melissa Levine, the University of Michigan Copyright Office gives a broad overview of copyright law from copyrightability, duration of copyright, permissions, to your rights as a user.
The Copyright Advisory Office at Columbia University, led by Rina Pantalony, provides a Copyright Quick Guide and several resources for determining fair use.
Copyright Chat is a podcast dedicated to discussing important copyright matters. Sara Benson converses with experts from across the globe to engage the public with rights issues relevant to their daily lives.