I had a lot of homework every day in primary school in Ireland during the 70s, and of course that only increased in secondary school. Initially it was a certain amount of time spent reading to a parent, there were spelling tests to study for, then we had arithmetic tables to learn, and after age 7 we had comprehension questions nightly based on selections from the Wide Range Readers, grammar, maths, handwriting practice, the occasional poem or story to compose, questions on history and geography, maps, and I remember a project or two (trees and their leaves, a report on a country, an animal of your choice, making a model of an Iron Age dwelling)...
My DCs got homework too - initially reading aloud, then pieces of writing, answering questions from their readers, maths, grammar, model of a log home associated with Little House on the Prairie, endless book reports - several every month, dioramas, dictionary searches, different kinds of writing, and cursive handwriting practice in 3rd grade. Around age 11-12 they had to produce essays in history.
I used to have them all sit down at the end of the afternoon and do it after they had played for a while, and if anyone had a question I was ready to help. I tried to tread a fine line between being available and actually getting involved. They all went through a spell of forgetting vital textbooks but luckily we had a school directory and could phone and have exercises dictated over the phone or could send someone to get a book from a classmate. Others used to phone us for help with forgotten books too, or to clarify instructions.