How did the beginnings of genetic research influence the Nazi party? A thorough, engaging unit incorporates the work of Gregor Mendel, the study of inherited traits, and the use of racism and discrimination during the Holocaust.

Show your class how engineers use graphs to understand large and complex systems. The resource provides the beginnings of graph theory by introducing the class to set theory, graphs, and degree distributions of a graph. 

Ninth graders are introduced to the concept of human embryology. Individually, they complete an exercise in which they determine which trait they got from which family member. In groups, they identify and label the reproductive organs...