While differentiation is such a hot topic in the education world, it may be a suitable time to reconsider ability grouping. It was removed from schools in the 1990s because many educators felt that it harmed the self-esteem of students in lower groups. However, it may improve the self-esteem of the students in lower groups because if they are successful, it would allow them to gain confidence.
Imagine joining a gym and being placed directly in the hardest aerobics class. Some people would do ok if they were active before joining the gym, others would struggle, and many would become so frustrated they would quit. On the other hand, if they were placed in a lower aerobics class, they would perform better, gain confidence and be excited to come back to the gym, progress slowly and move up to the more difficult classes.
Also, students can move up and down in groups. Reasons could be because they are performing well overall, or they understand the current subject matter (unit). The groups could be changed regularly based on student progress.3 The fact that most of the groups were permanent (the entire school year) when ability grouping was previously in schools was one reason for the downfall and removal.