1. AP Human Geography Models

2. Demographic Transition Model

3. Gravity Model

4. Rostow’s Stages of Growth

5. Concentric Circle Model (Burgess)

6. Hoyt Sector Model

7. Multiple Nuclei Model

8. Central Place Theory (Christaller)

9. Weber Model of Industrial Location (least-cost theory)

10. Von Thunen’s Agricultural Model

11. Epidemiologic Transition Model

12. Core Periphery Model

13. Domino Theory

14. Heartland and Rimland Theories (Macklander)

15. Neocolonialism
the economic and political policies by which a great power indirectly maintains or extends its influence over other areas or people

16. Thomas Malthus (Population)

17. Modernization & Dependency Theories
Modernization theory is a theory used to explain the process of modernization within societies. Modernization refers to a model of a progressive transition from a 'pre-modern' or 'traditional' to a 'modern' society. The theory looks at the internal factors of a country while assuming that, with assistance, "traditional" countries can be brought to development in the same manner more developed countries have. Modernization theory attempts to identify the social variables that contribute to social progress and development of societies, and seeks to explain the process of social evolution.
Dependency theory is the notion that resources flow from a "periphery" of poor and underdeveloped states to a "core" of wealthy states, enriching the latter at the expense of the former. It is a central contention of dependency theory that poor states are impoverished and rich ones enriched by the way poor states are integrated into the "world system."

18. Sustainable Development

19. World Systems Theory: Wallerstein

20. Bid-rent Theory

21. Rank Size Rule