Double folding card with special pen. Each child can solve the tasks on the two back sides and enter the results there. Self-checking is done using the front sides. The math problems are arranged differently and can be practiced repeatedly. Practical and sturdy, perfect for daily use in the classroom and at home. Easily wipeable without smudging and without color residues. Dimensions 1x1 board: 32.5 x 50 cm (front and back unfolded) with special pen - Made in Germany. Also available as a combo: "My Hundred Field" and "The Little Multiplication Table" with pen.