This teacher's edition investigates the biological and environmental mechanisms of adaptation within the Missouri River ecosystem. Author David C. Brummet provides a structured pedagogical framework designed to assist educators in conveying complex scientific concepts to students. The text utilizes the Missouri River as a primary case study to illustrate how organisms adjust to specific environmental pressures and habitat changes.

Educators frequently utilize this text as a foundational resource for classroom instruction within the Destinations in Science series. The material is noted for its clear, structured approach to teaching complex biological concepts to students.