TEKS (Texas Essential Knowledge and Skills): W.G. 6 (A) locate and describe human and physical features that influence the size and distribution of settlements. W.G. 6 (B) explain the processes that have caused changes in settlement patterns, including urbanization, transportation, access to and availability of resources, and economic activities. W.G. 7 (B) explain how physical geography and push and pull forces, including political, economic, social, and environmental conditions, affect the routes and flows of human migration; W.G. 21(A) analyze and evaluate the validity and utility of multiple sources of geographic information such as primary and secondary sources, aerial photographs, and maps; Lesson objective(s): TLW explore maps and im...