Sites to go for academic help.
Website: http://virtualnerd.com/
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://knowmia.com/
Website: https://glean.co/
Website: http://www.youtube.com/user/crashcourse/
Website: http://www.mathpickle.com/
Website: http://betterexplained.com/