R H Draney speculated:
I got transformational grammar in my 8th grade year, the 2nd year it
was offered at my Jr High. The year before I had a sketchy
introduction to traditional diagramming, with the result that I know of
it but can't do a thing with it.
Since this was about 45 years ago, the books we used were still cheap
booklets from the printshop at the University of Oregon, where the
curriculum was developed. But we got workbooks, too, which was a lot
of help.
(Later on, taking Computer Science courses that touched on automata and
compiler design, I got to see parse tree diagrams again, and felt quite
comfortable with them.)
Prior to 7th grade, we had very light-weight introductions to parts of
speech, but the emphasis early on was on vocabulary.
After 9th grade, we revisited grammar from time to time, but focussed
more on literature.
My studies in French (Jr High) and German (Sr High and College) covered
some grammar, of course, and I can say "passe' compose'" and "plusquam
perfect" with some idea of what they mean, but I am still catching up
with everyone in AUE about "progressive past" and various "future" ,
um, moods because the the 7th grade class didn't get that far, and the
8th grade class essentially lost a year in the transition.
(I could have opted for Latin in high school, and sometimes I think I
should have, but I think the German was worth it.)
As for my kids, now more or less grown, I'm not sure about when grammar
was in their curriculum, because I was the non-custodial parent during
their Jr High and Sr High years, and they changed schools more than
once.
/dps
--
Who, me? And what lacuna?