Open content is content without the conventional copyright restrictions.  It comes in all formats; images, text, video, music and is allowed to be shared, revised, remixed and re-distributed by the public at no cost to the user.  Before using open content, you must read and adhere to the licensing restrictions which may include giving attribution or credit to the author or licensor of the content.

• Education Portal - FREE online lessons
• OER Commons
  Open Educational Resources - Find Free-to-Use K-12 Teaching and Learning Content from Around the World
  
  
• Digital Textbooks
  
• Creative Commons
  "Creative Commons is a nonprofit organization that enables the sharing and use of creativity and knowledge through free legal tools."
  
  
• How to properly credit Creative Commons materials
  This page will help you properly attribute a Creative Commons licensed work.
  
  
• Library of Congress Photos on Flickr
  
• Flickr: The Commons
  "Flickr is home to over five billion of the world’s photos. Get a glimpse of another world by diving into the official White House photostream or the newest images from NASA. Or explore a moment in history with archived collections from the Smithsonian, Library of Congress and more in The Commons. See the world through someone else’s eyes, right here on Flickr."
  
  
• Audacity- Audio Editing Software
  Audacity is a free download where you can record and edit audio.
  
  
• ccMixter- music remixes
  Free Music Archive
  
  
• freeSFX - Sound effects library
  Please note you must agree to the terms and conditions of the site which include credits to use these free downloadable sound effects.
  
  
• Purple Planet Royalty Free Music
• SmartSound Royalty Free Music