For english i have to write a story. for the story, one of the chapters has to be about who i am as a person. a lot of people tried answering" i'm a 11 year old boy/girl that goes to this school. i have _ brothers/sisters and " the teacher said this wasn't the right way to answer the question, so what is?

The chapter should describe what makes you special.
Things like these:

I don't like . . .
I like . . .
I am fascinated by . . .
I get sad about . . .
I get happy about . . .
I wan't to find out everything I can about . . .
My favorite celebrity is . . . because . . .
My favorite person that nobody knows about is . . . because . . .
The earliest thing I can remember in my life is . . .
When I grow up, I want to . . . because . . .
The place in the world that I would most like to visit is . . . because . . .
I have already had some experiences that I would like to change.
   One of them was . . . .  I wish it didn't happen that way because . . .

Does this give you the idea ?
Things about you that probably could not be about anybody else.

You can start off by saying what you love to do and how has your life been as growing up abd then say how old are you and about other stuff