This article is a summary of comprehensive units on gender and sexuality diversity that the authors have used in teacher education courses in undergraduate and graduate social foundations of education classes over several years. The course lesson plan includes a five-part analysis of the following categories: biological sex; gender identity/sexual identity; gender roles; sexual behavior; and sexual orientation. The authors have experienced much success and positive student evaluation by using this approach. This is true even in religiously and politically conservative universities. The authors introduce the complexity of biology, gender roles, and gender identity, before addressing human sexuality. This helps to diffuse many stereotypes and misconceptions in the initial lessons.