Price: ¥1,540 (tax included) [Important Notes] This item has been inspected by an amateur. We do not accept discounts, returns, or refunds after purchase. Please purchase only if you agree to these terms. Thank you for viewing. ↓ The following is a product description ↓ [Content Introduction] This is a study guide for "Cog-Train," a comprehensive program that addresses academics, social skills, and physical well-being to cultivate the skills needed to thrive in school and society. The characteristic of this "search calculation" is, for example, based on the reverse idea of thinking about combinations of numbers that add up to 9 in your head, and at the same time, checking whether the numbers in the grid match those combinations, combining and calculating each number in your head. Through this cognitive-based program, you can have fun while simultaneously developing abilities such as becoming accustomed to calculations, becoming good at mental arithmetic, improving memory, developing a better sense of numbers, the ability to process information quickly, and the ability to plan things systematically.