BAROODY, Arthur J., WILKINS, Jesse L.M. & TIILIKAINEN, Sirpa H. (2003): The Development of Children’s Understanding of Additive Commutativity: From Protoquantitative Concept to General Concept?- In: BAROODY, Arthur J. & DOWKER, Ann (Eds): The Development of Arithmetic Concepts and Skills: Constructing Adaptive Expertise.- Mahwah: Lawrence Erlbaum Associates, S. 127-160. | BAROODY, Arthur J., WILKINS, Jesse L.M. & TIILIKAINEN, Sirpa H. (2003): The Development of Children’s Understanding of Additive Commutativity: From Protoquantitative Concept to General Concept?- In: BAROODY, Arthur J. & DOWKER, Ann (Eds): The Development of Arithmetic Concepts and Skills: Constructing Adaptive Expertise.- Mahwah: Lawrence Erlbaum Associates, S. 127-160. |