Elapsed time flash cards have notched corners for quick organization. Large, easy to handle 6-1/4″ x 3-1/4″ cards. Bold, heavy type to use with large groups. Durable, thick card stock (14 pt). Self-checking. Great for small groups, pairs, and whole class participation. Word problem solution. Set of 105 cards teach time telling on the hour, half hour, quarter hour, etc. Compares analog and digital time telling, as well as demonstrates calculation of beginning, ending, and elapsed time. Double-sided cards measure 6-1/4” x 3-1/4” (16cmx8cm).