For a bit of backstory, my calculus BC teacher in high school hated me and did her best to make my life difficult. One example of this: My school district swapped over to required uniforms that year (my last year, in fact). On Fridays, we were allowed to wear “jeans and a t-shirt”. I wore camo cargo pants. She sent me to the office because apparently “jeans” means “blue jeans only”. The lady at the office sent me back to the class with a note telling her to lay off. So she went to the principal about it, who decided to side with her.
After this, I decided if she wanted to make things hard for me, I was going to return to favor.