Educational videos are an excellent source of engaging and sometimes interactive learning material. Some of the free virtual libraries available online include free video tutorials , teachertube , learning made fun , one stop homeworkhelp and visual learning .
Salman Khan of Khan Academy has created exceptional videos for k-12 education. Not restricted to any one syllabus, the virtual library is available to students from across the globe, 24x7, FREE. With just a computer and a pen-tablet-mouse, he has created over a 1000 videos which are being used by students who can understand subject topics from Math and Science. Interestingly presented in conversational style, this non profit organization is set to be every academically challenged student's best friend. These videos can be accessed @ the khanacademy channel on youtube or khanacademy.org. Salman Khan and his website have been conferred with the 2009 Tech Award In Education. Below is a sample of his video on Binomial Theorem.