(Montana State College, Division of Education, 1961) Burton, Priscilla J.
The main purpose of this study was to investigate whether or not a form of ability grouping known as performance grouping had an effect on the students' achievement test scores that would not be obtained in a heterogeneous classroom. The major hypothesis held was that added gains would be shown on the standardized achievement test scores by the students in a school using performance grouping that would not be shown by students in a school using heterogeneous grouping.
