According to the current curricula, the learning material for the third grade can be practiced playfully and independently through free work, weekly plans, learning stations, support hours, or with additional exercises at home using this math course. Exercises on number structure, neighboring numbers, rounding, calculation wheels, calculation houses, calculation triangles, equations and inequalities, as well as various calculation methods take into account current didactic and methodological insights. The variety of content, including supplementary tasks, inverse tasks, tasks for written addition and subtraction, written multiplication and division with and without decimal numbers, as well as calculations on the number line, calculations with money, lengths, weights, and time spans, or with calculation advantages in the number range up to 1000, motivates children to practice independently and with joy.