> You shouldn't optimize for the average student; you should stratify instruction so students of different levels are pushed to their limits and beyond. While

> You shouldn't optimize for the average student; you should stratify instruction so students of different levels are pushed to their limits and beyond. While I personally agree with your point, I think your statement makes the case for the folks who developed this policy. The “problem” that these policymakers see is that students, when stratified, are not stratified across certain groups in a proportion that is similar to the population. For folks who focus on equality of outcome, this is a problem. For folks who focus on equality of opportunity, it is not a problem.