I went to fourteen different schools growing up (due to my folks moving a lot) and thus, I never really felt like I had "my" school or that I fit in. It was very hard to make friends, nearly always being the 'new' kid who started at the school in the middle of the year.
I did start noticing the economic disparity between my family and my classmates at around sixth grade, esp because buckle-back jeans were in style, I really wanted some, and was told we couldn't afford them. That would not be the last of what I wanted which we couldn't afford. Around that time, I started working in the cafeteria during lunchtime to earn a ticket for free hot lunches. This was good, but there was some stigma attached to it.
I had my share of bullies, esp. since I didn't tattle but kind of bore it silently. Luckily, I had no lunch money to take away, but did deal with a lot of name-calling and threats from two individuals. Thankfully, I didn't have to deal with either one of them for more than a year or so. I didn't like being the shortest kid in class much, either.
I also had a teacher who tried to humiliate me for not knowing Washington State history-- nevermind that I had gone to school in Oregon up until then. I had a geometry teacher who thought students learned more when shame was applied. PE wasn't great, but really, small potatoes in comparison.
Unfortunately, my parents created more of the problems I had in school than these other kids. I won't go into it, but their lack of support left my ostracized by my peers at times (often due to lack of appropriate dress/gear for events, like choir tours and such, which did have an affect on the group, right?). I struggled in school sometimes because my folks didn't help me with my homework. It was just assumed that I wasn't applying myself instead of me really not understanding the material/process.
I should also say, however, that my greatest advocates were three teachers. My sophomore biology teacher helped me believe I could actually do well in science. My sixth grade teacher was wonderful and gave me a lot of validation by displaying my poetry in the classroom and went to bat for me with my folks. And in seventh grade, the school guidance counselor kept an open door and listened a lot when I really needed someone to talk to-- a lot of things came up for me that year. These were the people who kept school tolerable for me, who kept me above-water, and I eternally thank them. Without school... I just don't know what would have happened to me.