Thomas, Janet Kennedy2022-07-262022-07-261964-08https://hdl.handle.net/11299/229585A Paper Presented to the Faculty of the Graduate School, University of Minnesota, A Requirement for the Degree Master of Arts (Plan B), by Janet Kennedy Thomas, August 1964.en-USUniversity of Minnesota DuluthPlan Bs (project-based master's degrees)Master of ArtsMaster of Arts in Curriculum and InstructionDivision of Education and PsychologyTeaching Arithmetic to Mentally Retarded ChildrenScholarly Text or Essay