Khan Academy
www.khanacademy.org

TED Talks
www.ted.com

Free Online Courses for High School Students (possible
http://diplomaguide.com/articles/Free_Online_Courses_for_High_School_Students.html

University of California College Prep Open Access
http://www.ucopenaccess.org/

National Repository of Online Courses: AP US History II
http://www.montereyinstitute.org/courses/AP%20US%20History%20II/nroc%20prototype%20files/coursestartc.html

HippoCampus-- Digital media for various subjects
www.hippocampus.org

Interactive Science Simulations
Fun, interactive, [[/en/research|research-based]] simulations of physical phenomena from the PhET™ project at the University of Colorado.
http://phet.colorado.edu/

NOAA Multimedia Discovery Missions
http://oceanexplorer.noaa.gov/edu/learning/welcome.html