President Barack Obama, left, waves to students after being introduced at TechBoston Academy in Boston, Tuesday, March, 8, 2011. Also on stage are Secretary of Education Arne Duncan, right, and ... more 
President Barack Obama, left, waves to students after being introduced at TechBoston Academy in Boston, Tuesday, March, 8, 2011. Also on stage are Secretary of Education Arne Duncan, right, and Melinda Gates, center, co-chair of the Bill and Melinda Gates Foundation. less 
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Associated Press | Photo By Pablo Martinez Monsivais
Tue, Mar 8, 2011 4:22 PM EST