A live image of U.S. President Barack Obama is projected onto a classroom wall for students in a room in Philadelphia

 
A live image of U.S. President Barack Obama is projected onto a classroom wall for students in a room in Philadelphia
A live image of U.S. President Barack Obama is projected onto a classroom wall for students in a room adjacent to the hall where Obama made his second annual back-to-school speech at Julia R. Masterman Laboratory and Demonstration School in Philadelphia, September 14, 2010. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS EDUCATION)