I don't really remember the first day, but liked primary school. Like others, I was very ready for it as at 5 (or long before that IMO) most children need to socialise, but it was a big shock to go from being with mum all day every day to a full week at school.
I do remember my sister's first day though. She ran away, and I was sent to look for her. I was 7! Can you imagine that happening nowadays? It happened more than once, too. She hated school.
Like M0nica, we had outside loos, and they were also awful. There was a canteen/dinner hall next to them, separate from the school building, but it had no kitchen, and the food was delivered from another school who catered for a few in the town.
We didn't stay for dinners though. My mum took us in the morning, collected us and took us home for lunch, then back again and picked us up at 4.00. It was a 10-15 minute walk each way, so there was no time to do more than eat and run - I don't know how we didn't have permanent indigestion. My brother was born the November after my sister started, and after that I took her and brought her home. I was 7 and she was 5. For a week or two, when my mum was in hospital having my brother, we did stay and the food was dreadful. It was never hot enough, and we got liver with tubes in it, lumpy mash and watery veg. The 'dinner ladies' made you clear your plates and more than one child was always sick, which is enough to put anyone off eating.
We did tests on Fridays, and had to sit in order of our score for all of the following week. Friday afternoons were arts and crafts, and I remember learning to knit, one week at a time, with one teacher (no TAs in those days) and 30 children. We spent half the lesson in the queue for assistance, and hardly any time knitting. Miss Green had to start again the following week to remind us what to do, but somehow I did learn and still knit nowadays.
The infants school was downstairs and juniors upstairs, with a different Head. The playgrounds were separate too - it was like having two schools in one building. The school is still there. I moved away, but my sister's children all went in their turn. I'm sure things were very different then.