7th grade.
About 1960.
We had English grammar and sentence construction (diagramming) infused into us for a whole year!
That has served me well, to this day.
Me too. 7th grade, 1962. Mr. Doane, the only male teacher in a school full of nuns and a few laypersons.
I don’t know when they quit teaching sentence diagramming. That and formal English grammar should still be taught, from elementary grades through high school.
We used Strunk and White
Miss Walker prepared us for life in the literate world