MacLeod, Charlotte M2022-07-262022-07-261967-08-18https://hdl.handle.net/11299/229723A Paper Presented to the Faculty of the Graduate School, University of Minnesota, A Requirement for the Degree Master of Arts (Plan B), by Charlotte M. MacLeod, August 18, 1967.en-USUniversity of Minnesota DuluthPlan Bs (project-based master's degrees)Master of ArtsMaster of Arts in EducationDivision of Education and PsychologyThe Effect of the Class Period Length and Frequency on Student Achievement in College Biology LaboratoriesScholarly Text or Essay