

Graduates sing before President Barack Obama delivers the commencement address at the Booker T. Washington High School graduation at Cook Convention Center in Memphis, Tenn., on May 16. Charles Dharapak/AP
Afghan President Hamid Karzai (l.) shakes hands with a teacher after giving a certification to her during a teachers' graduation ceremony in Kabul, Afghanistan, on March 30. Musadeq Sadeq/AP/File
President Barack Obama delivers the commencement address at the graduation ceremony for Booker T. Washington High School on May 16, in Memphis, Tenn. After the school administration implemented educational changes, the graduation rate jumped from 55 percent in 2007 to nearly 82 percent in 2010. Mark Humphrey/AP
Cadets toss their hats in the air at the conclusion of a graduation and commissioning ceremony at the US Military Academy in West Point, NY, on May 21. Mike Groll/AP
Forestry School graduate Claire Schlemme, of New York, wears a decorated mortarboard during commencement at Yale University in New Haven, Conn., on May 23. Jessica Hill/AP
Director Martin Scorsese (c.) walks in a processional during commencement exercises at Yale University in New Haven, Conn., on May 23. Scorsese was awarded an honorary degree of Doctor of Fine Arts. Jessica Hill/AP
Joint Chiefs Chairman Adm. Mike Mullen speaks during a graduation and commissioning ceremony at the US Military Academy in West Point, NY, on May 21. Mike Groll/AP
First lady Michelle Obama and Lt. Gen. David Huntoon, superintendent at the US Military Academy, arrive in Washington Hall for a graduation banquet the in West Point, NY, on May 20. Mike Groll/AP
President Barack Obama and Homeland Security Secretary Janet Napolitano bow their heads during the invocation at the US Coast Guard Academy graduation in New London, Conn., on May 18. Charles Dharapak/AP
In this May 19 photo, Rocky Boy High School graduate Dillon Demontiney hugs his mother Natalie Demontiney after giving her a rose during the Class of 2011 commencement ceremony at Rocky Boy's Indian Reservation, in Montana. Nikki Carlson/Havre Daily News/AP
Students from the College of Arts, Sciences and Engineering at the University of Rochester graduate at the Eastman Quadrangle in the rain in Rochester, NY, on May 15. Melanie Stetson Freeman/The Christian Science Monitor
Former President Jimmy Carter (l.) smiles as his name is recognized at Georgia State University at the Georgia Dome, on May 7, in Atlanta. Carter advised Georgia State University graduates in a commencement address to stretch their minds and hearts and to always strive to do their best. Hyosub Shin/Atlanta Journal & Constitution/AP
First lady Michelle Obama is greeted by University of Northern Iowa president Benjamin Allen before giving the commencement address at the UNI graduation, on May 7, at the UNI-Dome in Cedar Falls, Iowa. Charlie Neibergall/AP
Virginia Tech engineering graduate Joe Miller waves a American flag as part of a graduate procession onto the field of Lane Stadium in Blacksburg Va., on May 13. The annual spring commencement was canceled and the stadium evacuated after lighting was detected in the area. Matt Gentry/The Roanoke Times/AP
President Barack Obama takes the stage at the Miami Dade College North and West Campus graduation, on April 29, at the James L. Knight International Center in Miami. Charles Dharapak/AP