This is a speed card sugoroku (board game) for math class. It's a math teaching material mainly used in the fifth grade for the speed unit. There are 9 sets, so I think it can be used enjoyably if each group uses one. You can learn a difficult unit in a fun way. I have used them, but they were handled with care, so there is no damage. How about using them in the second semester classes? The regular price is 450 yen per set. Shipping costs are considerable, so I cannot offer a discount.