https://scratch.mit.edu

Free Math & Computer Programming Courses

https://www.khanacademy.org

https://www.codecademy.com

http://Coursera.org

http://EdX.org

http://Code.org

36 Resources To Help You Teach Kids Programming
http://java.dzone.com/news/36-resources-help-you-teach

MIT App Inventor tutorial to develop mobile apps on Android phones.
http://appinventor.mit.edu/explore/hour-of-code.html

Windows Apps
http://developer.android.com/index.html

Apple iOS Developer Program
https://developer.apple.com/programs/ios/