Lessons in English Grammar were common throughout my education in 10 different schools. I was good at the other things that went with the nitty gritty of specifically grammar lessons: precis, essay, comprehension and spelling and my written work was grammatical and correct.
I actually couldn't see much point in grammar beyond the basics, and managed to do very well at O level English Language without actually completing the grammar question. Good at applied grammar but not pure grammar.
Bluebell, spelling in GN posts is no guide to the posters
spelling capabilities. I can spell very well, unfortunately my fingers navigating the key board are less certain, particularly at present where numbness in my thumb and first two fingers caused by carpal tunnel syndrome mean I only use my ring and little finger of my right hand when typing.
Yes, if I slowly and carefully proof read everything I wrote I would pick most of my errors up but I will happily admit that I only do a quick and cursory proof read and, of course, miss things. Very different to the very careful proof reading I do before handing in essays to my tutors.