This was an assignment I did when teaching one class of ELA in fourth grade. I stole the idea from a teacher friend of mine (thanks Jamey!). She used the book The Best Part of Me as the literacy tie in and had students write about the best part of them.
One of the third grade teachers in my school loved the assignment and had her kids do it the first week of school.
The first picture was a fourth grade example of this project and the second is a third grade example.