| Metals of Antiquity | 0 | - | 4.93 | 85,877 |
| Elements by Picture | 0 | - | 4.29 | 63,944 |
| Animals by Skeleton Image | 0 | - | 4.79 | 38,974 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.47 | 27,270 |
| Former Countries by Territory Map | 0 | - | 4.97 | 86,788 |
| Empires by Maps | 0 | - | 4.98 | 96,082 |
| Planets By Picture Quiz | 0 | - | 4.55 | 49,075 |
| Elements Named for Countries | 0 | - | 4.50 | 19,607 |
| Words for Leaders | 0 | - | 4.80 | 218,744 |
| German Loan Words | 0 | - | 4.28 | 130,134 |
| Islands by Shape #2 | 0 | - | 4.86 | 45,184 |
| Circular Cutouts from a World Map | 0 | - | 4.98 | 54,405 |
| All Country Flags of the World | 0 | - | 5.00 | 3,017,922 |
| Country Flags Quiz #1 | 0 | - | 4.98 | 2,379,578 |
| Country Flags Quiz #2 | 0 | - | 4.98 | 1,009,690 |
| Country Flags Quiz #3 | 0 | - | 4.98 | 676,641 |
| Make a Stained Glass Window | 0 | - | 4.99 | 59,656 |
| Flags with Crescents | 0 | - | 4.98 | 145,124 |
| Country Flag Trivia | 0 | - | 4.81 | 44,702 |
| Country Flags with Eagles - Picture Quiz | 0 | - | 4.99 | 77,191 |
| Country Flags with the Union Jack | 0 | - | 4.83 | 57,000 |
| Pixelated Flag Quiz | 0 | - | 4.98 | 68,889 |
| Flag Maths | 0 | - | 4.92 | 50,583 |
| Country Flags with the Sun - Picture Quiz | 0 | - | 4.85 | 42,635 |
| National Soccer Team Logos | 0 | - | 4.84 | 157,514 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 95,307 |
| Similar Country Flags - Multiple Choice Quiz | 0 | - | 4.95 | 41,793 |
| Famous Foreheads #1 | 0 | - | 4.49 | 67,024 |
| Flags to Languages | 0 | - | 4.95 | 159,835 |
| Countries with Glaciers | 0 | - | 4.97 | 96,735 |
| Countries by Change in Carbon Dioxide Emissions | 0 | - | 4.92 | 48,373 |
| Countries with the Most Forest | 0 | - | 4.89 | 137,836 |
| Fruits by Picture | 0 | - | 4.19 | 739,230 |
| Old Movies by Picture | 0 | - | 4.50 | 21,798 |
| Musical Instruments by Picture #2 | 0 | - | 4.24 | 43,223 |
| Years in History by Picture | 0 | - | 4.43 | 30,356 |
| Classic Movies by Movie Posters | 0 | - | 4.43 | 21,554 |
| Geography by Picture - H | 0 | - | 4.52 | 55,417 |
| Geography by Picture - N | 0 | - | 4.46 | 39,763 |
| Geography by Picture - R | 0 | - | 4.54 | 38,785 |
| Geography by Picture - T | 0 | - | 4.63 | 55,015 |
| Country Flags Multiple Choice | 0 | - | 4.98 | 115,903 |
| Name the Pixelated Landmark | 0 | - | 4.82 | 55,647 |
| Car Logos Quiz #1 | 0 | - | 4.45 | 474,470 |
| Random Logos Quiz | 0 | - | 4.33 | 190,949 |
| All North American Pro Sports Logos | 0 | - | 4.74 | 96,092 |
| Brand Logos Quiz #1 | 0 | - | 4.81 | 2,139,531 |
| Pictures by Letter - J | 0 | - | 4.27 | 36,298 |
| Pictures by Letter - B | 0 | - | 4.31 | 39,722 |
| Pictures by Letter - D | 0 | - | 4.11 | 34,023 |
| Pictures by Letter - M | 0 | - | 4.24 | 34,479 |
| History by Picture - N | 0 | - | 4.41 | 36,817 |
| Name the Constellations - With a Map | 0 | - | 4.90 | 31,500 |
| Body Parts in History and Culture | 0 | - | 4.48 | 32,980 |
| NCAA Football Team Name Vocabulary | 0 | - | 4.17 | 18,859 |
| Military History Vocabulary | 0 | - | 4.92 | 60,642 |
| Name that Bug | 0 | - | 4.11 | 44,064 |
| Islands by Shape #1 | 0 | - | 4.27 | 71,695 |
| 1970s Celebrities by Picture #1 | 0 | - | 4.18 | 53,520 |
| 1970s Celebrities by Picture #2 | 0 | - | 4.20 | 46,873 |
| Islands by Picture | 0 | - | 4.31 | 93,121 |
| Name that Object #1 | 0 | - | 3.57 | 94,998 |
| WWII Figures by Picture | 0 | - | 4.88 | 41,243 |
| Animals by Close-up Image | 0 | - | 4.41 | 204,626 |
| Mammals by Picture #3 | 0 | - | 4.42 | 55,925 |
| Aquatic Mammals by Picture | 0 | - | 4.41 | 39,935 |
| Mammals by Picture #1 | 0 | - | 4.76 | 82,900 |
| 1940s Celebrities by Picture | 0 | - | 4.46 | 44,482 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 296,893 |
| Name that Historical Figure #2 | 0 | - | 4.44 | 250,120 |
| Name that Historical Figure #5 | 0 | - | 4.41 | 92,252 |
| Geography by Picture - A | 0 | - | 4.35 | 57,119 |
| Geography by Picture - B | 0 | - | 4.36 | 52,632 |
| Geography by Picture - D | 0 | - | 4.10 | 43,343 |
| Geography by Picture - F | 0 | - | 4.25 | 48,475 |
| Geography by Picture - G | 0 | - | 4.39 | 45,525 |
| Geography by Picture - J | 0 | - | 4.14 | 36,512 |
| Geography by Picture - C | 0 | - | 4.28 | 54,404 |
| Geography by Picture - L | 0 | - | 4.34 | 56,042 |
| Geography by Picture - M | 0 | - | 4.11 | 38,508 |
| Geography by Picture - P | 0 | - | 4.28 | 40,300 |
| Geography by Picture - S | 0 | - | 4.35 | 44,752 |
| Random Flags Quiz | 0 | - | 4.41 | 257,896 |
| Flag Coloring Book Puzzle #1 | 0 | - | 4.96 | 152,380 |
| Satellite Images Quiz #1 | 0 | - | 4.47 | 123,302 |
| Satellite Images Quiz #2 | 0 | - | 4.65 | 104,205 |
| Satellite Images Quiz #4 | 0 | - | 4.55 | 84,823 |
| Satellite Images Quiz #5 | 0 | - | 4.46 | 46,084 |
| Satellite Images Quiz #6 | 0 | - | 4.53 | 35,871 |
| Cities by Picture #1 | 0 | - | 4.66 | 77,795 |
| Soccer Team Logos | 0 | - | 4.22 | 331,969 |
| Ultimate Car Logos Quiz | 0 | - | 4.71 | 129,108 |
| Video Game Logos Quiz | 0 | - | 4.37 | 152,668 |
| Movie Logos | 0 | - | 4.29 | 201,788 |
| Brand Logos That Start With M | 0 | - | 4.42 | 49,868 |
| Brand Logos That Start With B | 0 | - | 4.47 | 49,271 |
| Brand Logos That Start with A | 0 | - | 4.52 | 57,307 |
| History by Picture - A | 0 | - | 4.23 | 40,843 |
| History by Picture - B | 0 | - | 4.36 | 43,592 |
| History by Picture - C | 0 | - | 4.35 | 48,734 |
| History by Picture - F | 0 | - | 4.33 | 33,537 |
| History by Picture - G | 0 | - | 4.39 | 37,733 |
| History by Picture - D | 0 | - | 4.32 | 39,493 |
| History by Picture - E | 0 | - | 4.28 | 39,339 |
| History by Picture - H | 0 | - | 4.38 | 32,656 |
| History by Picture - K | 0 | - | 4.41 | 29,728 |
| History by Picture - M | 0 | - | 4.23 | 32,497 |
| History by Picture - O | 0 | - | 4.37 | 32,371 |
| Name that Nut, Seed, or Bean | 0 | - | 4.65 | 50,773 |
| Animals - Taxonomy to Common Name | 0 | - | 4.75 | 25,876 |
| Countries with the Most HIV | 0 | - | 4.50 | 42,936 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 31,961 |
| Countries that Desalinate the Most Water | 0 | - | 4.79 | 37,207 |
| Words with Colors Quiz | 0 | - | 3.95 | 25,730 |
| Art Works Picture Quiz #1 | 0 | - | 4.50 | 97,142 |
| Art Works Picture Quiz #2 | 0 | - | 4.46 | 86,591 |
| Musical Instruments by Picture #1 | 0 | - | 4.54 | 256,686 |
| Foods by Picture | 0 | - | 3.79 | 217,173 |
| Shapes and Symbols #2 | 0 | - | 4.02 | 55,690 |
| Flowers by Picture | 0 | - | 4.46 | 101,586 |
| Junk Foods by Picture | 0 | - | 3.71 | 90,149 |
| Christmas by Picture | 0 | - | 4.28 | 26,260 |
| Name that Object #2 | 0 | - | 3.65 | 14,373 |
| Hats by Picture | 0 | - | 4.21 | 17,169 |
| Weapons by Picture | 0 | - | 4.07 | 19,243 |
| Cars by Picture | 0 | - | 3.93 | 36,690 |
| Reptile Picture Quiz | 0 | - | 4.27 | 13,176 |
| Authors by Picture | 0 | - | 4.47 | 23,815 |
| Plants by Picture | 0 | - | 4.17 | 13,289 |
| Name that Object #3 | 0 | - | 4.00 | 13,285 |
| College Sports Logos Quiz #3 | 0 | - | 4.33 | 47,150 |
| Songs by Picture Quiz #1 | 0 | - | 4.66 | 57,831 |
| Songs by Picture Quiz #2 | 0 | - | 4.43 | 52,118 |
| Animals A-Z by Picture | 0 | - | 4.14 | 59,903 |
| Birds by Picture #1 | 0 | - | 4.45 | 35,017 |
| Extinct Animals by Picture | 0 | - | 4.47 | 31,027 |
| Mammals by Picture #2 | 0 | - | 4.27 | 53,119 |
| 1960s Celebrities by Picture #1 | 0 | - | 4.25 | 65,086 |
| 1960s Celebrities by Picture #2 | 0 | - | 4.23 | 47,253 |
| 1950s Celebrities by Picture #1 | 0 | - | 4.22 | 47,817 |
| 1980s Celebrities by Picture #2 | 0 | - | 4.15 | 65,585 |
| 1980s Celebrities by Picture #1 | 0 | - | 4.01 | 56,825 |
| 1990s Celebrities by Picture #1 | 0 | - | 4.12 | 73,460 |
| 1990s Celebrities by Picture #2 | 0 | - | 4.11 | 65,750 |
| 2000s Celebrities by Picture #2 | 0 | - | 4.13 | 85,485 |
| Women in History by Picture | 0 | - | 4.36 | 23,689 |
| 1950s Celebrities by Picture #2 | 0 | - | 4.28 | 43,042 |
| International Footballers by Picture | 0 | - | 4.40 | 45,522 |
| Name that Historical Figure #3 | 0 | - | 4.40 | 216,160 |
| Name that Historical Figure #4 | 0 | - | 4.29 | 141,619 |
| Name that Historical Figure #6 | 0 | - | 4.22 | 80,026 |
| Musicians by Picture #1 | 0 | - | 4.37 | 88,276 |
| Musicians by Picture #2 | 0 | - | 4.26 | 61,671 |
| Musicians by Picture #4 | 0 | - | 4.06 | 53,987 |
| Musicians by Picture #3 | 0 | - | 4.11 | 50,618 |
| Geography by Picture - E | 0 | - | 3.53 | 45,652 |
| Landforms by Picture | 0 | - | 4.35 | 19,093 |
| Geography by Picture - I | 0 | - | 3.97 | 37,705 |
| Geography by Picture - K | 0 | - | 4.29 | 31,241 |
| Emoji Flags | 0 | - | 4.34 | 40,910 |
| Satellite Images Quiz #3 | 0 | - | 4.38 | 70,541 |
| Satellite Images - Island Chains | 0 | - | 4.42 | 58,229 |
| Islands by Satellite Image #1 | 0 | - | 4.71 | 62,923 |
| Peninsulas by Satellite Image | 0 | - | 4.52 | 26,073 |
| Landmarks Picture Quiz #1 | 0 | - | 4.20 | 362,096 |
| Airline Logos | 0 | - | 4.43 | 129,019 |
| Brand Logos Quiz #2 | 0 | - | 4.75 | 1,515,441 |
| Brand Logos Quiz #5 | 0 | - | 4.41 | 951,623 |
| Brand Logos Quiz #4 | 0 | - | 4.44 | 899,999 |
| Car Logos Quiz #2 | 0 | - | 4.39 | 216,830 |
| Mostly-American Candy Logos | 0 | - | 4.11 | 139,534 |
| Brand Logos That Start With S | 0 | - | 4.37 | 46,012 |
| Brand Logos That Start With D | 0 | - | 4.35 | 50,543 |
| Brand Logos That Start With L | 0 | - | 4.36 | 48,583 |
| Brand Logos That Start With C | 0 | - | 4.14 | 41,300 |
| Pictures by Letter - A | 0 | - | 4.08 | 30,185 |
| Pictures by Letter - E | 0 | - | 3.49 | 31,892 |
| Pictures by Letter - C | 0 | - | 4.06 | 27,321 |
| Pictures by Letter - G | 0 | - | 4.07 | 25,245 |
| Pictures by Letter - L | 0 | - | 4.12 | 27,696 |
| Pictures by Letter - F | 0 | - | 4.18 | 26,024 |
| Pictures by Letter - Z | 0 | - | 4.17 | 21,301 |
| Pictures by Letter - Y | 0 | - | 4.19 | 23,903 |
| Pictures by Letter - R | 0 | - | 4.10 | 22,397 |
| Pictures by Letter - K | 0 | - | 4.14 | 22,623 |
| Pictures by Letter - I | 0 | - | 4.15 | 27,437 |
| Pictures by Letter - N | 0 | - | 4.11 | 22,027 |
| Pictures by Letter - P | 0 | - | 4.06 | 23,680 |
| Pictures by Letter - U | 0 | - | 4.09 | 18,640 |
| Pictures by Letter - T | 0 | - | 4.34 | 25,050 |
| History by Picture - I | 0 | - | 4.27 | 23,203 |
| History by Picture - J | 0 | - | 4.21 | 23,645 |
| History by Picture - L | 0 | - | 4.21 | 27,585 |
| History by Picture - P | 0 | - | 4.10 | 22,493 |
| History by Picture - Q | 0 | - | 4.02 | 19,697 |
| History by Picture - R | 0 | - | 4.20 | 23,810 |
| History by Picture - S | 0 | - | 4.17 | 24,971 |
| History by Picture - T | 0 | - | 4.26 | 29,909 |
| History by Picture - U | 0 | - | 4.23 | 22,406 |
| History by Picture - V | 0 | - | 4.26 | 22,289 |
