| Chapter 11: Tracking the Macroeconomy | 17 | October 9, 2012 |
| Chapter 5: Elasticity and Taxation | 16 | October 4, 2012 |
| Chapter 17: Earth's Interior and Geophysical Properties | 28 | April 11, 2011 |
| Chapter 15: Geologic Structures | 36 | April 5, 2011 |
| Chapter 16: Earthquakes | 26 | April 3, 2011 |
| Chapter 16: Social Psychology | 91 | April 3, 2011 |
| Chapter 8: Time and Geology Definitions | 39 | March 29, 2011 |
| Chapter 11: Development | 83 | March 15, 2011 |
| Chapter 14: Waves, Beaches, and Coasts | 27 | March 14, 2011 |
| Chapter 13: Deserts and Wind Action | 22 | March 14, 2011 |
| Chapter 12: Glaciers and Glaciation | 42 | March 14, 2011 |
| Chapter 11: Ground Water | 28 | March 14, 2011 |
| Chapter 10: Streams and Floods | 39 | March 13, 2011 |
| Chapter 9: Mass Wasting | 26 | March 11, 2011 |