> 97-XX Mathematics education > 97CXX Psychology of and research in mathematics education

97C20 Affective aspects (motivation, anxiety, persistence, etc.)	97C30 Student learning and thinking (misconceptions, cognitive development, problem solving, etc.)	97C40 Assessment (large scale assessment, validity, reliability, etc.)
97C50 Theoretical perspectives (learning theories, epistemology, philosophies of teaching and learning, etc.)	97C60 Sociological aspects of learning (culture, group interactions, equity issues, etc.)	97C70 Teachers, and research on teacher education (teacher development, etc.)
97C80 Technological tools and other materials in teaching and learning (research on innovations, role in student learning, use of tools by teachers, etc.)	97C90 Teaching and curriculum (innovations, teaching practices, studies of curriculum materials, effective teaching, etc. )	97C99 None of the above, but in this section

97CXX Psychology of and research in mathematics education