Cline, Gladys2022-07-262022-07-261957-08https://hdl.handle.net/11299/229636A Paper Presented to the Faculty of the Graduate School, University of Minnesota, A Requirement for the Degree Master of Arts (Plan B), by Gladys Cline, August 1957.en-USUniversity of Minnesota DuluthPlan Bs (project-based master's degrees)Master of ArtsMaster of Arts in Curriculum and InstructionDivision of Education and PsychologyThe Role of Psychology in Arithmetic InstructionScholarly Text or Essay