This flash card pack, complete with activities, teaches facts about the 46 U.S. presidents. Features official White House Historical Association portraits of 46 presidents, 8 era cards, and political party history. Updated to include President Biden. Watch students enjoy learning and build skills on their own or with their friends ... at school, home, or on the go! Durable, no-see-through cards with quick sorting, rounded corners. 56 two-sided cards, 3 1/8" x 5 1/4".