Spark laughter and learning with questions about charts, graphs, measurement, money, time, algebraic thinking, and other math subjects. Versatile cards adapt to growing abilities for endless rounds of learning fun and mastery. Great for school, home, and travel. Self-checking, answers on backs. Durable, no-see-through cards. Quick-sorting, rounded corners. 56 two-sided cards, 3.125″ x 5.25″. For grades 1-3.