Diversity takes many forms. The following websites discuss ways to bring awareness of diversity into your teaching.

Teach for inclusion.
This extensive document from U.N.C.-Chapel Hill, discusses various aspects of diversity in the college classroom.

Learning disabilities in college students.
This link is a part of the LDOnline.com website, which discusses issues of learning disabilities in all age groups.

Sexual orientation in the college classroom.
This topic is discussed by Shelley Bannister of Northeastern Illinois Univ.

Creating an inclusive college classroom.
This online article discusses strategies for creating a classroom environment in which students feel safe and supported.