This upsets me and makes me angry as a teacher, the good kids lives ruined by the ones who think it is ok to mess around and disrupt lessons.
Can I suggest you get in touch with the governors?
Give the specific descriptions about specific lessons, on named names and times.
The school should be enforcing discipline.
It is possible, if you have a discipline policy, and stick to it, and back up all your staff, and exclude those who keep breaking it
Of course, you get penalised by ofsted for exclusions, but who cares, when the alternative is a school children can't learn in.
sort of defeats the object of being a school, really.
And do look at other schools, there really are schools that exist that are strict on behaviour and this situation doesn't arise.