youtube channel for engineering lectures.

[beatrix_kiddo]

http://www.youtube.com/user/nptelhrd

This channel has lectures on almost every stream. Worth subscribing to.
Also there is a thing called MIT opencourseware where you could do assignments and listen to free lectures. How great that is considering MIT is THE best tech institute in the world.

[theindianbee]

Awesome channel for learning... I have added all the videos under the educational category of videos in Indianbee every one can watch he entire series on biology

http://indianbee.com/bee-videos.html