Does the choice of maths textbook make a difference?

The mathematics textbook is the foundation of instruction for most teachers in primary schools. However, knowledge about the role of textbooks for students’ learning is limited, yet at the same time, textbook quality is a construct hard to approach. In our studies, we developed a topic-specific approach towards textbook quality for different features of the arithmetic curriculum. Hence, we were able to show both a measure for the topic-specific textbook quality as well a relationship with the corresponding achievements of students after working with their textbooks.