I started primary in 1976, left secondary in 1989. Some of mine:
Corporal punishment (the most obvious one for a lot of us I think). In junior school (early 80s) we had a headmaster who would save all the week's canings for Friday afternoon assembly. The kids lined up on stage and were caned in front of the whole school. It was fucking horrific looking back - I remember a boy in my year crying and wetting himself on stage and he never lived it down, the nicknames followed him to secondary school
Girls doing needlework/cookery while boys did woodwork/metalwork
Boy in my class whose surname was Gaye. Geography teacher used to call him 'Poof' and 'Queer' which of course other kids found hilarious and joined in. He changed his surname halfway through secondary school
In my primary class an overweight girl was made to stand on a chair so the whole class could see what we would look like if we were greedy and ate too much
The headmaster who caned kids on stage also used to get girls to kiss him on the cheek and say thank you at prize givings. He also used to make comments about how we were 'developing' and once said in a conversation with my mum that I was getting 'a broad back'. The mums didn't seem to mind his comments
In primary school the children in the SEN class were described as [vile word I can't bring myself to type] by teachers and children alike quite unselfconsciously
In secondary school an English teacher had an affair with a sixth former and she became pregnant. He left but wasn't reprimanded and got a teaching job in another school the following year. The couple are still together all these years later!
It really was a different time and not necessarily for the better, either. I do have lots of happy memories of school too though!