The newly established Working Group Number sense concerns research on the teaching and learning of number systems and arithmetic (including models for operations in the number systems, ratio and proportion, rational numbers and number- theoretical aspects). Research for different ages from kindergarten up to pre-service teachers, with a focus on grades 2-6, is addressed.
The thematic emphasis is put on research-based specifications of domain-specific goals of what should and can be learned, and in which priority; on the analysis of learning processes and learning outcomes in domain-specific learning environments and classroom cultures; and on new approaches to the design of meaningful and rich learning environments and assessments.