Information about the series: Active mathematics instruction that supports all children brings mathematics to life. Students discover mathematical structures in everyday situations and learn to generalize and apply them. Holistic approaches make the connections visible. Active, exploratory learning and concrete projects provide ample space for independent work. Practical exercises, including both structured and automatic tasks, make students aware that practice is a central and integral part of mathematics education. Individual differentiation for everyone: With diagnostic tools, teachers assess the learning and development status of each child, ensuring that every child receives personalized support. Geometry, measurement, and practical arithmetic play an important role in student-centered instruction.