VIDEO: Google Execs go back to school

Executives of the world's most popular search engine have been making several appearances over the past two weeks at colleges where they shared words of encouragement for the classes of 2009.

Speaking at the University of Pennsylvania's commencement on Monday, Google chairman and CEO Eric Schmidt told about 6,000 graduates that they need to find out what is most important to them - by living analog for a while.

"Turn off your computer. You're actually going to have to turn off your phone and discover all that is human around us," Schmidt said. "Nothing beats holding the hand of your grandchild as he walks his first steps."

Below are 4 videos of  co-founder Larry Page at the University of Michigan, May 2; CEO Eric Schmidt at Carnegie Mellon University, May 17 and University of Pennsylvania, May 18; and Vice President of Search Product and User Experience Marissa Mayer at the Illinois Institute of Technology, May 18.