| Sumner, Sawyer - |
| Famous Explorers in History (18) | | Multiple Choice | 2010.04.02 |
| How hydroelectric power plants generate energy (8) | | Multiple Choice | 2010.07.12 |
| How planes stay in the air (28) | | Multiple Choice | 2010.09.27 |
| The art of graffiti in Bogotá (8) | | Multiple Choice | 2010.09.21 |
| The Art of Shadow Puppetry in Southeast Asia (8) | | Multiple Choice | 2010.09.05 |
| The Development of Color Theory in Art (30) | | Multiple Choice | 2010.11.15 |
| The Different Types of Clouds (8) | | Multiple Choice | 2010.02.08 |
| The Evolution of the Roller Skate (15) | | Multiple Choice | 2010.08.25 |
| The Fascinating World of Extreme Ironing (9) | | Multiple Choice | 2010.05.23 |
| The History of Chess Grandmasters (16) | | Multiple Choice | 2010.03.02 |
| The History of Fortune-Telling Methods (20) | | Multiple Choice | 2010.10.01 |
| The History of Yodeling as a Musical Tradition (8) | | Multiple Choice | 2010.02.18 |
| The Job of a Police Officer (21) | | Multiple Choice | 2010.03.28 |
| The Largest Libraries of the Ancient World (19) | | Multiple Choice | 2010.03.13 |
| The Life Cycle of a Butterfly (8) | | Multiple Choice | 2010.11.01 |
| The Life Cycle of a Frog (9) | | Multiple Choice | 2010.08.13 |
| The Lost Art of Chainmail Weaving (8) | | Multiple Choice | 2010.09.09 |
| The Most Mysterious Radio Signals Ever Detected (18) | | Multiple Choice | 2010.04.19 |
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