First of all I found this essay extremely cute. Just wanted to put that out there.
Some parts were confusing for me though.
When I took AP Statistic, it changed my view of math. Math, from another perspective, it's more about interpretation rather than application.
"That's good question!" I shouted out after I realized the "trick".
"Yes, that is a good question." Mr. Tsai said while smiling.
^I don't understand how the dialogue between you and your teacher shows that math is about interpretation.
"Miss, do you know why the deverivative..." I said mysteriously.
"Actually no, why?" She waited for me to answer.
"Look, I just realized this yesterday while in shower..." I said loudly.
"Wow, nice...Yeah, explain to the class." she agreed
^I don't understand the ...'s
When other students understood the concepts and said!"
^Now this is the important part of the essay. You should write more about how you understood that maybe math is not just math but rather a tool that you can use to communicate with other people and give them hope. After all it was the only thing that you knew when you came to the states. I want to see the story build up.
"Because I'm a math-magician."
^Too cool ;)
Maybe you should cut down on the dialogue a little because it makes your essay choppy. Concentrate on the purpose of your essay. You want to show the reader how you've progressed through math and ultimately came to help other people through your understanding of it.