Preventing math difficulties. The materials for support have been specifically developed for working with children who still show difficulties in learning mathematics. Targeted support can prevent the development of a math disorder by fostering a secure understanding of mathematical fundamentals (number sense, place value system, arithmetic operations, etc.) and developing expandable calculation strategies in the child. In addition to a workbook, a set of index cards, and pens, the material collections include games and various materials such as shake boxes, feeling bags, number cards, dice, calculators, and much more. Workbooks and index cards can also be ordered separately.