Use Ten-Frame Trays to visually teach early math skills such as counting, 1-to-1 correspondence, number patterns, addition, subtraction, and more. Trays are connectable and can also form 5 x 5 arrays for teaching multiplication concepts. Set includes 10 ten-frame trays, 5 five-frame trays, 150 double-sided counters, and activity guide. Ten-Frame trays measure 6.25"L x 2.625"H. Ages 5+.