| Buck, Clayton - |
| American Flag (24) | | Multiple Choice | 2016.09.13 |
| Ancient Petra: Lost City of Stone (10) | | Multiple Choice | 2016.05.11 |
| Astounding Natural Wonders of Papua New Guinea (10) | | Multiple Choice | 2016.08.15 |
| Chad Geography (16) | | Multiple Choice | 2016.11.06 |
| Cleopatra, the Queen of Egypt (8) | | Multiple Choice | 2016.07.02 |
| COVID-19 pandemic in Thailand (10) | | Multiple Choice | 2022.02.24 |
| George Washington's resignation as commander-in-chief (28) | | Multiple Choice | 2015.02.09 |
| Great Pyramid of Giza (100) | | Multiple Choice | 2017.11.26 |
| Ibusuki volcanic field (15) | | Multiple Choice | 2015.12.20 |
| K2 Mountain (35) | | Multiple Choice | 2016.05.06 |
| Kimbanseke (21) | | Multiple Choice | 2016.06.01 |
| Kinderdijk Windmills (10) | | Multiple Choice | 2016.07.27 |
| Mozart (37) | | Multiple Choice | 2016.01.07 |
| Pantomimes and Fairy Tales (24) | | Multiple Choice | 2016.02.10 |
| Persian mythology (100) | | Multiple Choice | 2010.04.05 |
| Pre-Columbian Art (17) | | Multiple Choice | 2016.12.05 |
| Suriname's Unique Blend of Indigenous Cultures (19) | | Multiple Choice | 2016.03.12 |
| The Magnetic Hill in Ladakh Defying Gravity (8) | | Multiple Choice | 2016.04.05 |
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