My wife is a primary school teacher, a few of my friends are teachers, and I have two kids in primary school. So this is a topic I’m very familiar with.
What people forget is that the curriculum changes. It changes frequently. When I was at school the curriculum was very different to what it is like now. For example I actually learned the term “digraph” from my kids, not my own schooling. I mean, I always knew what digraphs and split digraphs were, but I never knew they were called digraphs.