Nah, OT gave an A too.
So it was not an assignment for marks, but an extracurricular contest or something, and the teacher running it was an OT bochur Shliach. I don't recall if he saw it and didn't notice, or if my mother had corrected me before I handed it in.
As an OTnick I must ask, what's does this "assignment to write an essay" even mean? In English or otherwise?
Funny how the OT bochurim who came to teach and apparently didn't even understand the concept, quickly figured out how to use essays as punishments