If you hear any casual remark about boys needing blue, girls in pink....boys do the handiwork, boys will be boys, boys are rough, girls are smarter, any remarks about male occupations, female occupations. What a man does as a gentleman, what a woman does as a lady. There can also be differences in how an instructor reacts to a situation if it is a boy or a girl student, like "toughen up" to the boys, and a bit more reassuring with the girls, perhaps protective.
It might not be as memorable as a specific lesson plan and course objectives, but that's the quality of social expectations...less noticed than expected.
"We all of us know down here that politics is a tough game. And I don't think there's any point in being Irish if you don't know that the world is going to break your heart eventually."-Daniel Patrick Moynihan, December 5, 1963
Honestly, I don't remember ever making a connection with any one of my teachers or observing them or even liking them for that matter. I really wasn't the best student and did a LOT of daydreaming in school. I don't know what other people's childhoods and time in school was like, but that was it was for me. If I was taking "social cues" from anyone it was mostly my friends. I was always very sociable and close with my group of friends.