Primary Education: Same teacher, whole year-group[1], same classroom, all day.
I cannot say for sure, but (with possible exception of the footnote) I think we were heading solidly towards "1 teacher per 30 students", perhaps over. From what I recall of parent complaints. Before/after/between classes ('playtimes' were synchronised across all years, as was dinnertime with either school meal or popping off home for those close enough to a willing-and-able home) teachers could be found in a Common Room, the ?non-teaching? Headteacher had an office, in later years... Not sure if they were just as non-teaching before that office was built on (brick extension to the Victorian stone main building).
Secondary Education, 'lower school' (years 1-3, as then named): A 'form' that convened in a Form Room for morning (and evening) registration, one among several (
such forms for the whole year of intake (from ~8 Primary 'feeders'? But newly regrouped and maintained as those new groupings). The form, as a block, then generally moved to the same designated Maths/Science/English/whatever class, and resident subject-'specialist'[2] teacher, whatever the schedule dictated, for each single- or double-blocked lesson, doing an endless Musical Chairs with each of the other same-year Forms (and all other years) for most classes[3]. By the 3rd year, IIRC, there was an 'option' system for Science. Previously ?3? forms split across three science labs with general use, but then we were asked to "choose two" and (according to the numbers who had chosen every combination) reshuffled to use
specifically a Chemistry lab, a Biology Lab, a Physics lab, as appropriate, demolishing the 'Form boundaries' for the given slots alone.
I am quite definite that the Form was ~30 students during all 'normal' classes. What schedules the semi-static teachers adhered to, whilst the various units of peripatetic student body shuttled around, I do not know, but most
actual classes were packed to 30:1 sort of levels, however many teachers/administrators/etc were rattling around
sans students or prepping for their next influx.
Secondary Education, 'upper school', years 4-6 (4-5 by the time I got to 5): Reconvened 'forms' for morning/afternoon registration and administrative purposes only. As per the "Science" split in year 3,
everything is 'Options'. Well, nearly. English ('Pure') and Maths were compulsary slots with no alternates. Religious Education
might have been compulsory (but just one, maybe two, 'filler' single-slots per week, taught in a very secular/multicultural way by the teacher who had taught Geography in years 1-3). P.E. was still year-wide (with increased pupil-autonomy over
which season-specific activity could be 'enjoyed', except for the compulsary Cross Country, for which at least one of frost, sleet, deluge or drought seemed to be always be arranged by suitable appeal to the Sports Teacher gods, every season every year), but other than that it was mix'n'match to certain logistic limits. (You could not choose both Geography and History, as they were - per year - in the same timetable slot as each other[4] and my name isn't Hermione Granger.) A good friend (outside of school, and often socialised with during breaks between classes) had been in a different Y1-3 form, was in the same Y4-5 'registration' class but in almost no (except P.E.) Option classes.
In general it was still perhaps 25-30 pupils per Option class (I don't know how much schedule-jiggling was needed for that, to make it true). English Literature (an option vs
who-knows-what, perhaps Music? Separated from and additional to the compulsary Pure English - i.e. reading/'appreciation' rather than writing/composition) was a class of maybe 15 (unpopular Option?) that was taught in a small room with maybe room for 20 desks/places, but
filled with 30. Which made squeezing into the chairs part of the lesson, even though we weren't at all shoulder-to-shoulder.
The average pupil:teacher ratio was offset the
other way by Geography, where the teacher assigned was not my prior, inspirational Geography teacher (now seen only in R.E.) but the teacher who was Head Of Upper School who would rather stay in his Upper School office (leave us work -
maybe, sometimes never appeared at all) than teach. (The Head Of Lower School, at the relevent time, had been the Music teacher. She was almost always in class for us, though admitedly we did quite a lot more 'copying into our exercise books' of rather stodgy musical theory, so she probably also retreated into her own paperwork more than she might have.)
Again, I don't intimately know (except w.r.t. the HoUS) what time staff spent away from pupils. But does that matter much when pupils are always experiencing
1/
30th of a teacher during a lesson?
Tertiary Education: Being beyond the age of compulsary education, had it been "Year 6 (lower) and Year 6 (upper)" at the Secondary school site, we'd have been a few self-selecting (and free to continue without pressures to earn a wage) individuals, and I think the logistics of catering for our needs was the reason why that was dropped in favour of the College set up for A-Levels, apprenticeships and other Further/Continuing/Adult Education needs in the borough's main town. There, the timetable was easier to work with (though at one point I had to switch Chemistry class-slot because the original one ended up clashing with a different course I was taking) and plenty of free time (or late-start/early-leaving opportunities, at either end of the day) between the various timetabled classes, even with (at one point) five separate A-Levels on my card (one of them offset by a year, another being a 'split' subject but only half the time Pure and half the time Applied).
Classes there were much closer to 15:1, maybe lower. One may have been 20+:1, approaching 30:1, at least at the start.
Higher Education: I can't really remember much. Large lecture-theatres not 'packed' but well populated. Lab sessions (physics, computing) were split. Tutorials were a handful at a time, per assigned tutor. Examination rooms had hundreds of us (but then, when I later did Exam Invigilation for a Secondary School, it was the same sort of thing with almost the entire year present, even if they were doing different subjects/sub-subjects in different parts of the school hall used).
On the whole, of course, you'd expect Uni to do this better, and Local Authority-controlled Primary/Secondary schools depends highly on the LA, and the pressures upon the LA from both above and below. Which might depend upon political valencies between various levels of government as well as the actual political philosophies of the various colours of those elements..
[1] Except for one year ("Year 5", as counted in Primary, IIRC, rather than whatever it would be called in K-12 notation these days) when it became half the year-group class with one teacher in one room (portacabin), the other half with a different teacher and room (again, portacabin) for their class, but still each all the time, all day, every day. Can't remember if that was a room-size limitation, temporary bulge in age-demographics or the need to intensify (last year at Primary) education to prep for moving to "Big School", but somehow we split, and I'm not sure how much that improved the pupil:teacher ratio.
[2] Or best available alternative. For two years we had a "permanent supply teacher" of general proficiency take our English classes, and French lessons were never the same teacher for any consecutive years, with at least one of those being someone
technically in the Maths department (though was never
our Maths teacher) but ostensibly was qualified for the language teaching as well.
[3] With two types of exception:
a} Physical Education was scheduled in the same slots on every schedule for everyone in the same year. All boys to the boys' changing room, all girls to the girls', whatever then happened (subsplit into activities, all in a changing room to one main gendered-activity or even the whole year to a 'combined' one) was independent of any 'form grouping' and may indeed have been intentionally shuffled-and-cut,
b) Some
rare classes (e.g. Home Economics) took each form-group of ~30 and divided them into 2x~15s/3x~10s or whatever for (say) cookery education in the first term, materials (sewing, etc) in the second term for one division of the form, but sewing-term then cooking-term for the next. But effectively it was still "all, and only, this form doing HomeEc in this time-slot" but with a rare division of labour.
[4] And another subject that I forget the name of, but was some sort of "Generalised Humanities" class that those who liked
neither Geography or History could choose, without much as much academic pressure. Similarly, after having just French in years 1-3, there was a choice now between French (continue what might have been learnt, either liking or tolerating the language so far learnt), Spanish (add to your portfolio, probably now knowing you were able to advance languages) or International Studies (not really a language class, for those who
really dislike languages). FYI I chose Geography (reluctantly, I really liked History too) and French (reluctantly, as I really had not excelled in French so far and had no expectation that I'd improve)