1. Effects of counting and thinking strategies in teaching addition and subtraction problems;Adetula;Educational Research,1996
2. Longitudinal studies related to the classroom;Almy,1971
3. Children's mathematical thinking; a developmental framework for preschool, primary, and special education teachers;Baroody,1987
4. Children's relational knowledge of addition and subtraction;Baroody;Cognition and Instruction,1999
5. Does mathematics instruction for three- to five-year-olds really make sense?;Baroody;Young Children,2000