The author argues that constructivist learning environments where multiple perspectives are respected and there is no single "right "answer" are better for encouraging diversity. The ideas for instructional design for diversity are more theory-based than practice-based, but this has some interesting concepts.
"The major advantage of this learning model is that one of its key design goals is to encourage students to bring multiple perspectives to questions/cases/problems/issues and projects as part of their learning. This approach to learning views diversity as a strength to be exploited rather than a problem to be solved."