kesstrel I am pretty sure that noble addressed this very question a good few posts back. Yes, they met those theories in college but how they practice and how they teach different classes varies, and develops with experience. I dropped out of a PGCE, as a mature student, about 25 years ago, even then, there was a recognition that ideas popular in the 1960s, although they brought energy and enthusiasm into teaching, only worked for some pupils. My subject was going to be maths, (as noble's is) and there was a recognition then that many pupils needed to be taught - learning by discovery only worked for some. Ditto a vigourous discussion about learning times tables. All the staff had been practicing teachers for a number of years, some were still holding part-time teaching posts. Were they untypical?
But a lot of people, including some teachers, feel we need more and better teaching of grammar in our schools, both to help improve writing, and to provide a basis for later MFL teaching.
Yes, but do we need to know about subjunctives at 10, or 'fronted adverbials'? Or whatever? We learnt about verbs in infants - 'doing words'. I can remember as a 10 year old learning about adjectives, adverbs, conjunctions and different types of nouns. Quite honestly, that was sufficient for primary. We followed it up at Secondary.