| Chapter 12: Hormones | 24 | October 26, 2012 |
| Combo with Essentials of Medical Language - all 15 chapters | 1,008 | October 7, 2012 |
| Essentials of Medical Language - chapter 15 | 71 | October 6, 2012 |
| Essentials of Medical Language - chapter 14 | 36 | October 6, 2012 |
| Essentials of Medical Language - chapter 13 | 25 | October 5, 2012 |
| Essentials of Medical Language - chapter 12 | 46 | September 30, 2012 |
| Essentials of Medical Language - chapter 11 | 66 | September 29, 2012 |
| Essentials of Medical Language - chapter 10 | 76 | September 28, 2012 |
| Essentials of Medical Language - chapter 9 | 90 | September 21, 2012 |
| Essentials of Medical Language - chapter 8 | 60 | September 20, 2012 |
| Essentials of Medical Language - chapter 7 | 79 | September 17, 2012 |
| Essentials of Medical Language - chapter 6 | 87 | September 11, 2012 |
| Essentials of Medical Language - chapter 5 | 48 | August 12, 2012 |
| Esssentials of Medical Language - chapter 4 | 91 | August 7, 2012 |
| Essentials of Medical Language - chapter 3 | 100 | August 3, 2012 |
| Essentials of Medical Language - chapter 2 | 75 | August 1, 2012 |
| Essentials of Medical Language - chapter 1 | 58 | July 30, 2012 |
| Chapter 30 - Conservation Biology | 27 | April 3, 2012 |
| Chapter 30 - Conservation Biology | 13 | April 3, 2012 |
| Chapter 29 - Energy Flow & Cycles | 33 | March 22, 2012 |
| Chapter 28 - Population Ecology | 21 | March 15, 2012 |
| Photosynthesis - Chapter 27 | 15 | February 23, 2012 |
| Cellular Respiration - Chapter 26 | 17 | February 23, 2012 |
| Energy, Enzymes & Metabolism | 24 | February 23, 2012 |
| Biological Diversity Unit Review | 29 | February 16, 2012 |
| Chapter 23 - Animalia | 36 | February 9, 2012 |
| Chapter 23 - Animalia | 24 | February 9, 2012 |
| Chapter 21 - Plants | 33 | January 31, 2012 |
| Protits & Fungus - Chapter 21 | 23 | January 18, 2012 |
| Chapter 19 - Taxonomy | 24 | January 5, 2012 |
| Natural Selection and Evolution | 21 | December 6, 2011 |