What is the author's tone in The Freedom Writers Diary by Freedom Writers?

The overall tone of The Freedom Writers Diary is very casual. While the sections written by Erin Gruwell are a bit more formal, the bulk of this book tells each writer's tale through their own eyes, using their unique language. Many of these students were considered "unteachable" by Gruwell's fellow teachers and many had never written before. Yet, the honesty and enthusiasm for writing clearly shines through each anonymous entry.