An Analysis of Heterogenous and Achievement Grouping Among an Experimental Group of Ninety Students in the Los Alamos, New Mexico, Schools

This study is based on the hypothesis that children make greatest individual progress under a system of achievement grouping. Such a plan is not to be confused with ability grouping. When children are grouped according to their achievement, it is possible, and even likely, for a child of low average ability to be in the same group with children of great ability because he is achieving at a high rate