How is Scout different from her classmates in To Kill a Mockingbird?

Scout differs from her classmates in several striking and important ways.

One of the most basic is that she is not being raised by her mother. She's being raised by Atticus, a single father. This leads to several other differences.

For example, Atticus treats Scout with considerable respect, and allows her a lot of freedom. As a result, she is much more adult than many of her peers are.

One of the things she does is first learn to read before she is taught in school, and then to read extensively in things that she cares about, rather than reading the way the school wants her to.

This is one of the many ways she is a rebel. She's a rebel in other ways that are partially innate, and partially a result of Atticus raising her. She is brave and ethical beyond her peers, and that sets her apart. She is compassionate, as you can see when she becomes friends with Boo.