You’re perfectly entitled to your opinion of course, I’m sure sets benefit some pupils and teachers.
I can’t see why teachers can’t teach mixed ability groups, they managed it perfectly well through my school life. There was a certain amount of leading be example from the good and bright kids, class detentions meant peer pressure to behave well. All teaching and knowledge was available to all kids.
I left secondary school with the top A level marks in the year, yet I started it lagging behind in reading and maths. If I had been put in bottom classes with disruptive pupils, firstly it would have been too much, I would have hated school, disengaged had extremely poor mental health. It would never have allowed me to progress (I was a late developer, I didn’t read until 7). I had number blindness until around age 11.
I suspect sets are more for the benefit of the teachers than pupils (plus a sense of superiority for those in top sets).
it’s clear from your post you would probably label kids in bottom sets as likely the disruptive ones. Have you ever thought this grouping together of kids and lower expectations of them might be a self fulfilling prophecy?
All children should be elevated upwards, sets only serve to perpetuate inequality.
I came from a poor working class background, by mixing with kids with different home lives, and therefore often different attitudes to learning, behaviour, expectations and experiences it elevated me.
A child’s ability at 11 is only really a reflection of where they have come from, by perpetuating that in sets from an early age, schools are limiting where these children are going.
Sets might benefit the already advantaged, but they effectively keep the already advantaged in their position. Once a child has been in a lower set for a while it’s nearly impossible to extricate themselves from a cycle of reduced access to higher level knowledge and lower expectations. Even if, by some miracle, they do manage to climb out of the pit the educational system and life opportunities has dug for them they spend years playing catch up.
Parents are aware of this bias towards higher achieving pupils, being easier and more pleasant to teach. That’s why many spend a small fortune in tutors fees to make up for often limited education. But again this, when linked to a structure involving sets, gives certain pupils unfair advantages, less well off children with poorly educated parents don’t get this advantage.
For these, and many reasons, I think sets are an extremely bad idea. They are simply a reflection of societal structure with perhaps the odd few managing to escape.
IME children learn as much from other children as adults.