to think that at Parents Evening there should be enough time slots

[Justforlaughs]

for all pupils. How can they justify giving a science teacher 25 time slots when they teach 90 pupils? This year is the first time I have managed to see my daughters science and english teachers in 3 years! I know that 90 pupils is a lot to teach, but there must be a way of getting round this.

We did this at a school I worked at. It was ok but imo parents need specialist input at GCSE level and beyond not a form tutor sitting in front of a pile of grades and trying to sound knowledgeable about Bio when they are a Drama teacher!

So a good idea for Lower School but not for Y10 and beyond - the school I worked at soon cottoned on to this and it all worked much better after that.

One of the secondary schools I work with, has a progress day for form tutors. The whole school is taken off timetable, and then form tutors are a available for parent meetings from 10am until 7pm. The meetings last around half an hour and any issues concerning individual subjects are discussed as well as personal development. If there are concerns in subject areas, the form tutor will follow this up with the relevant staff member, and the parents concerns addressed.
Students are expected to come in with parents, and it tends to be really well attended.
Additionally they have traditional parent evenings scheduled by year group. The parents' feedback on this is overwhelmingly positive.

This is a school in an area of deprivation and disadvantage and recently Ofsted rated 4. They are working very hard to improve and this is the 3rd year of this popular scheme

My school also does progress days with the tutor and parents evenings with the teacher. Initially people were very sceptical about the tutor meetings but they are very good for discussing the student's overall school experience, including suggestions for extra curricular activities, how to approach revision, whether organisation is an issue and friendship issues.
I wouldn't want to lose the subject teacher evenings though, I think they are important too.

DDs school has learning development meetings with tutors. However, in the 11 years worth of them they've done, none of them have been of any use whatsoever. In DD2s case, the tutor didn't bother turning up for her last one .

We do have traditional parents evenings though which are a bit of a scrum, but I've always managed to see the teachers I needed to (apart from one, but he was off ill, so that's allowed I think )

It needs managing carefully - but all of our tutors are paid to be tutors, if that make sense, and it is their first responsibility, so they need to know exactly what is going on at GCSE level in all subjects. Very few parents ever feel the need to see a specialist teacher. We have vertical tutor groups, too, so the relationship between parents and tutors develops over the five years, and often families are together, so Y11 and Y7 siblings in same group, same tutor.

At DDs school the pupil has to organise booking slots - 5 mins with 5 mins between each to get between them (the teachers don't get the breaks, obv). Even so, do the maths... if the parent's evening lasts 3 hours that's 36 slots so its fine if they've got one set in that year, hopeless if they have 3 sets. DDs chemistry teacher has told the ones who are doing well not to book slots - which is fine - and is also staying in school between end of school day and start of parents evening to see any parents who can make it then. Sounds shattering!

After yr7 the pupils come to parent's evening too, good way to avoid confusion!

OP, hope you can get what's happened straightened out -that doesn't sound good.