This teaching manual was developed by Dr. Rikki Wagstrom, Engaging Mathematics Institutional Partner and Associate Professor of Mathematics at Metropolitan State University. The manual contains two modules for use in either a standard Calculus I-II sequence or a one- semester applied calculus survey course. The first module, Calculus Exploration 1: Rates of Change, explores declining milkweed abundance in Iowa crop fields and the implications for monarch butterflies. The second module, Calculus Exploration 2: Definite Integrals, explores monarch reproduction, a crucial factor for survival of the species.