Ok, file this under baggage, but I still feel the pain from being mistreated by my high school calculus teacher.

Here's one of the things he did that made me feel especially bad:

I was a junior when I took calculus and at the end of the year the seniors had a week off. So for a week I was the only person in the class. This teacher spent that week in the teachers' lounge leaving me alone in the classroom. To me it felt like he was saying I wasn't worth his time.