The Great Rift Valley is a significant geographical feature in East Africa that is believed to be vital in the study of human evolution. This document presents a brief overview of the Great Rift Valley and its importance, particularly focusing on Ethiopia. The valley is characterized by its unique landscape, including tall cliffs, deep lakes, and expansive savannas, which created an ideal environment for early human ancestors. The document includes activities that encourage critical thinking about the area's significance for human origins and how environmental changes may have influenced the evolution of bipedalism in our ancestors. Through guided questions and hypothesis activities, learners are prompted to explore the relationship between geography and human development.