The history of ability grouping, especially since 1920, is reviewed and three recent surveys on its use are described. Current data was collected from school officials in all states concerning: the grade levels at which grouping is used; the length of time it has been used; the bases on which students are assigned to groups; the number of students…

This paper synthesizes the three substantive reports on ability grouping described in TM 000 501-503. It lists the characteristics of ability grouping as practised in American school systems. Extensive conclusions and recommendations, generally unfavorable to ability grouping are given. Alternative educational strategies for improvement of…