Why are classrooms the only place that ability grouping is somehow wrong? How come sports have varsity teams? Why do kids have to tryout for band?
Heck, a high ability student would be better off with 4 hours of quality teaching plus one hour of tutoring others than 5 hours of mediocre teaching. That's how many workplaces do it. High ability has high output and faster ramp-up and raises; they then help mentor the next level of skills.
I thought I've seen in studies that ability grouping works when the curriculum & teaching is appropriately leveled to ability.
