Website: http://www.youtube.com/teachers
Website: http://www.ted.com/
Free iPad app: https://itunes.apple.com/us/app/ted/id376183339?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/ted/id376183339?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.ted.android
Website: http://www.khanacademy.org/
Free iPad app: https://itunes.apple.com/us/app/id469863705?mt=8&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/id469863705?mt=8&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=org.khanacademy.android
Free Android Tablet app: https://play.google.com/store/apps/details?id=org.khanacademy.android
Edmodo app: https://spotlight.edmodo.com/product/khan-academy,324527/
Website: http://teachertube.com/
Website: http://www.nationalgeographic.com/
Website: http://www.billnye.com/
Website: http://ed.ted.com/
Website: http://www.schooltube.com/
Edmodo app: http://www.edmodo.com/publisher/schooltube
Website: http://www.youtube.com/education
Website: http://edufire.com/
Website: http://www.youtube.com/schools
Website: http://savetube.com/