6th grade. I don’t even remember her name, but my 6th grade teacher commended me on using the correct too (two/to/too). It was at that point I felt that what I had to say (and write) in class mattered. It set a standard for me academically; and I didn’t want to be less than what the teacher said I was (smart!).
I wish I could remember her name and thank her for believing in me more than I did.