Here's a great story: The Open High School of Utah. Not only do they using open source software, they also use open courseware. All of their courses are released as Moodle packages under a creative commons licence at the end of each year, covering both sides of the free tools and free content equation. One of the drivers behind this project is David Wiley whose TEDx talk is inspirational. One of the teachers at this school says "I can't imagine going back to copyrighted material after using open source". I know what she means.