I would’ve thought anything under 10 was too small (which was the smallest class I’d ever been in - 2 girls/8 boys and we just about worked out)
Now I’ve got a new job at a village school and they have a year 1/2/3/4 class (although no year 1s) with 6 pupils and a 5/6 with 6 pupils also.
Honestly there has been no arguing about pairs or general class unpleasantness, there’s been 1 small argument at break-time (in the past month) but that was due to a girl with a learning disability misunderstanding something and getting upset.
Around 1/4 of the children have varied disabilities but are all treated extremely nicely by the other children, never singled out or anything.
In conclusion (I’m not sure how this became so long), I now think the smallest class size is probably 5 or 6, as long as there is a few others to play with at break. Opinions?