Olson, Dale Arthur2015-05-122015-05-121988https://scholarworks.montana.edu/handle/1/6613enCompetency-based educationMathematics--Study and teachingJunior high school studentsStudents--AttitudesThe effect of mastery learning and wait time on student achievement and attitude in seventh and eighth grade mathematicsDissertationCopyright 1988 by Dale Arthur Olson