P052011PS-0870.CR2

President Barack Obama greets teachers in the East Room of the White House, before the Presidential Awards for Excellence in Mathematics and Science Teaching group photo, May 20, 2011. (Official White House Photo by Pete Souza)

This photograph is provided by THE WHITE HOUSE as a courtesy and may be printed by the subject(s) in the photograph for personal use only. This photograph may not be manipulated in any way and may not be published, disseminated or broadcast without the written permission of the White House Photo Office. This photograph may not be used in any commercial or political materials, advertisements, emails, products, promotions that in any way suggests approval or endorsement of the President, the First Family, or the White House.