Old Classroom A recreated schoolroom inside the Ford House in Breckenridge, Colorado, can help solvers practice finding differences--13 in this puzzle--between images. Copyright © 2002-2024 All-Star Puzzles All rights reserved

Credit: Gates Frontiers Fund Colorado Collection within the Carol M. Highsmith Archive, Library of Congress, Prints and Photographs Division. To view the original image: http://www.loc.gov/pictures/collection/highsm/item/2017885595/