The grouping of students in classrooms on the basis of mixed abilities. It is the opposite of homogeneous grouping or tracking–i.e., the process of sorting students of the same age or grade level into categories and assigning them to various kinds of classes with different levels of instruction, for most or all of the school day, and for the long term or permanently. (NFA)
the organization for instruction of students of differing levels of intelligence or achievement in one or more skills or subjects, either within or across classes. Cp. ability grouping; homogenous grouping.
The practice of mixing students of varying abilities, interests, or ages in academic classes. Heterogeneous classes may be formed school-wide or within classrooms where two to five students learn together.