How do you show diversity in practice on a assignment?

As a public school teacher, I have lots of opportunity to experience diversity. I have students from every country imaginable, and many times I am able to smooth out problems that arise from differences/diversity among students. We are just now doing a PTA project during which every child gets to write a paper or do a creative artwork/song/play about the subject: "Diversity Is...". Of course I have to define "diversity", and we discuss this, which is why I am on your website. Tolerance, respect, and acceptance of the differences that others bring to one's life are very important in our workplace and on my assignment as a teacher of art to children.