All children should acquire a solid foundation in mathematics. However, classrooms are becoming increasingly heterogeneous, and it is often challenging to address the needs of children with special educational requirements. This guide presents an inclusive teaching approach that engages all students. The introduction highlights the general principles of inclusive education. The second section explores what characterizes mathematics instruction in elementary school: What foundational pedagogical principles should be established in the first two grades? And what constitutes a mathematics lesson that fits into an inclusive overall concept? In the third part of the guide, you will receive concrete assistance in the form of a structured concept for the first and second grades. Here, you will learn how to teach the respective subject content—from number sense and arithmetic operations to...