The Associated Press, in collaboration with Green Light Learning Tools, is bringing the Oval Office to the iPad. Starting today, “The Presidency,” a new educational e-book geared toward students in fourth through eighth grade and educators, is available for download at the Apple iBookstore for $5.99. Readers can tap their way through a brief history of democracy, illustrated by AP images of the Acropolis in Greece to the U.S. Capitol dome in Washington, and browse through pictures of influential first ladies. Or they can click through an interactive timeline noting all of the U.S. presidents from George Washington in 1789 through today.