Rice commencement speaker Salman Khan's address to the graduates focused on contributions of a different kind: He urged the students to do everything they can to "increase the net happiness in the world."

Khan is the founder of the Khan Academy, a free online education platform and not-for-profit organization that has made waves in the field of education. In 2004, Khan's online tutorials for a young cousin gained a wider audience, and five years later he turned his collection of free educational videos into the online Khan Academy. Today, his more than 3,200 online tutorials attract 6 million viewers every month, and Time magazine recently named him one of the world's 100 most influential people.

For more: http://news.rice.edu/2012/05/12/khan-...