Grammar was taught a little bit in early primary school, but from what I remember the 2nd half of primary was all about story writing and descriptive writing.
Secondary school was just making up complete BS explaining what the author meant when he wrote X and Y. Apparently an author can't just write "the car was red" because it was red, oh no, it has to have something to do with how it was a fast, powerful car and red has connotations of fast angry things.
So what you end up with is a load of kids who can chat utter shite, but can't form proper sentences.