How can diversity in the classroom help me be a better teacher?

As a class we read about this in chapter 2.  We also discussed this in class by getting into groups.  We found out that diversity is a need to show how good of a teacher you are. Whether or not you deal with diversity will determined your fate as a teacher. Also you want to be able to teach every kid that is why we go into teaching in the first place. We should want the challenge and succeed in at as well. I would like to find out more on how to address this topic and how to incorporate this in my classroom.