Dear Calvin
I think, I feel for you, even if I never changed school so far. As you know, I’m in a high school, but when I was 6th grader, my classmates teased me too.
My tip is that: ignore things –for example when they tease you because you are bad in sport- (but, I think you can try to be better in sport and start to go gym or go somewhere else). Just be calm if they tease you. Maybe they are envious, because they are fatter than you, but they weren’t able to lose weight.
In summary, in my opinion you should tell everything to your parents. They know you better than me. But I tried to help you.
Your Friend,
XY
Remélem tudtam segíteni
Ha elírtam valamit, akkor bocsi, csak sietnem kellett.
De azért remélem hogy jó.