all of them... top set was generally the same group of people in every subject with a couple of exceptions being stronger in certain subjects over others...
In primary school it was for Maths, English, and a combined one for Science, History and Geography. And then two of us from the year skipped two periods of Maths and English each week to replace then with "Further Maths" and Latin, respectively.
In secondary school we only had sets for Maths. But then again, 5 of us from the year skipped two periods a week and replaced it with "Olympiad Maths", even though that turned out to just be a doss.
Edit: Actually I wasn't in the top set for everything. I was in the bottom set for P.E.
We had 4 Rugby teams ordered by ability. Then we had a "Rejects" Rugby team for people who still played but weren't good enough to play for one of the real teams, against other schools. And then we had the "Rota Group" for people who were so bad at Rugby that they just played other sports in rotation. And then we had the "walking" option which was what it sounds like, just go for a walk because you're so bad at all sports. Except it really ended up being the "sit around" option, because nobody could be bothered to go for a walk. That's what set I was in
In my defence I'm not that bad at sports, I'm really good at football. But apparently that's a "lower class sport" and my school was too posh to offer it.
I was in the top set for english (triple english) but I was in foundation maths - I was in foundation science but I wanted to do it normally so they let me go into the "normal" sets
Maths and science. For English i was moved from set 2 to set 4 after our end of year 9 exam and remained there. I still think it was BS. I was genuienly in a class with idiots. 60% ended up being druggies by sixth form. 30% couldn't even speak English properly. There was a smalll section that just turkish all lesson. I still occasionally get me fun of by friends in my a level maths class for once being in that english set till this day
I still got an A in it though. I was so smug to my teacher on results day. He was such a condescending ****.