Mathematics 6 Mathematics teachers 6 Training of 3 Study and teaching 2 Education, primary 1 Group work in education 1 Junior high school teachers 1 Mathematic teachers 1 Mathematics -- Study and teaching (Elementary) Mathematics teachers -- Training of 1 Mathematics teachers-Training of-United States 1 Mathematics-Study and teaching-Curricula-United States 1 Mathematics-elementary; mathematics teachers-In-service training 1 Research 1 Science & mathematics teachers-in-service training 1 Science teachers 1 Study and teaching (Elementary) 1 Teacher participation in curriculum planning-United States 1