Self introduction,my goals

I am thirteen years old and I'm in sixth grade at Shinjeong elementary school.My hobby is to match many kinds of cube,I am now here at GLPS summer camp because my parents made me, They said I can learn Leadership or whatever at this camp but I think I have leadership so I don't really see the point. I have one brother and a baby sister. She is nine month old.And my brother is the same age as me, he's nice but sometimes he gets really mad. I moved to Incheon Songdo when I was 12 and a half years old, and I was in America for one and a half years and I experienced elementary school and middle school there. I was a really bad student there though, but I was really good at math.
America learned easy stuff so in middle school, so they thought I was a genius or something, so they offered me to be a school representative. I like to play guitar even if I'm not very good at it. I think that my personality has some unique things.
I get  really mad whenever people do not hear me when I'm talking,
And I like to get recognized by people, and I can't stand the smell of beans. My three goals that I did for 2013 is first, raise grades, second, raise my height third, do good in debate. I would really like to raise my grades because my score was not very good on the last test and my parents were really mad. Let me tell you this, I got more than ten wrong. When I got my score, my mind just went blank, I didn't know how was I going to show my parents, so that's when i made my goal. And I really need to raise my height too,my mom said you only grow a year and then you stop growing when you hit puberty. I think I'll be hitting puberty in a few month so I should start drinking a lot of mil, and about my third goal, I get really nervous when I stand in front of the class and try to free talk. So I should  read books to develop my skills and practice to get over my stage fright.