It's not often that we stumble across a resource so great we have to tell everyone about it but the Khan Academy is just one of that nature.

Salman Khan started this online tool to remote tutor his 6th grade relative and soon everyone started requesting his videos online. This is a heartwarming story that turned into a huge success.

The videos range from 1+1 to college level mathematics, physics, finance and more. It's an excellent tool that will surely be a great help to many.

Check it out here:

Have fun learning.

Bottomup.