Frame math lessons perfectly! With simple visualization and ease of use, our Ten-Frame Trays reinforce early math skills such as counting, 1-to-1 correspondence, number patterns, addition, subtraction, and more. Trays are connectible 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 discs, and activity guide. Ten-Frame trays measure approximately 6-1/4" x 2-5/8".