| U.S. Presidents by Picture | 0 | - | 4.87 | 426,731 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,366 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,022 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,761 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,702,627 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,202 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,708 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,145 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 193,725 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,120 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,005 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,291 |
| Presidents that Beat Thomas Jefferson | 0 | - | 4.49 | 24,959 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,516 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,201 |
| Presidential Actors | 0 | - | 4.36 | 19,186 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,471 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,500 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,834 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,026 |
| U.S. President Scramble | 0 | - | 4.40 | 116,835 |
| Random U.S. States on a Map | 0 | - | 4.96 | 626,985 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 234,519 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,415 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,805 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,583 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 93,874 |
| Presidential Middle Names | 0 | - | 4.41 | 60,328 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,394 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,632 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,455 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,021 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,077 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,919 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,860 |
| U.S. Presidents Who Added the Most Territory | 0 | - | 4.66 | 14,119 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,345 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,268 |
| First Ladies of the United States | 0 | - | 4.28 | 85,683 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,963 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,234 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 77,168 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,219 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,208 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,981 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,597 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,898 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,310 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,840 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 302,679 |
| United States Map Quiz | 0 | - | 4.98 | 4,160,871 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,655 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,076 |
| The George Washington Presidency | 0 | - | 4.03 | 14,550 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,737 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,656 |
| The John Adams Presidency | 0 | - | 4.12 | 8,751 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,939 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,745 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,330 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,694 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,860 |
| Colonies of the Americas in 1775 with a Map | 0 | - | 4.88 | 19,644 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,414 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,762 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,395 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,689 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,797 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,785 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,267 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,956 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,530 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,006 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,573 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,742 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,535 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,632 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,359 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 332,523 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,085 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,905 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,818 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,206 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,288 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,984 |
| US States Quiz | 0 | - | 5.00 | 16,892,884 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,248 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,541 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 82,617 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,848 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,149 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,998 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,119 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,770 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,328 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,197 |
| Pixelated United States Map | 0 | - | 4.87 | 94,346 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,791 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,857 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,542 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,610 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,613 |
| The Kennedy Family | 0 | - | 3.90 | 14,077 |
| American Revolution Decoder | 0 | - | 4.10 | 20,963 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,397 |
| Events in U.S. History | 0 | - | 4.41 | 28,688 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,121 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,104 |
| The Most Recent... United States | 0 | - | 4.45 | 18,468 |
| The American Civil War | 0 | - | 4.62 | 52,451 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,994 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 507,067 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,537 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,536 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,134 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,428 |
| U.S. States By Population | 0 | - | 4.92 | 153,625 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,555 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,499 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,695 |
| US States with an Empty Map | 0 | - | 5.00 | 625,183 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,610 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,398 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,253 |
| Draw All US State Borders | 0 | - | 4.99 | 137,944 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,696 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,148 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,859 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,323 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,611 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,349 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,836 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,533 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,640 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 78,613 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,198 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,325 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,481 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,897 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,226 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,190 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,952 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,359 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,623 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,533 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,983 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,699 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,292 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,870 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,362 |
| Rivers of the United States | 0 | - | 4.93 | 66,247 |
| Names of Generations | 0 | - | 4.09 | 45,037 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,238 |
| U.S. Presidents by State | 0 | - | 4.34 | 68,704 |
| American Founding Fathers | 0 | - | 4.42 | 23,231 |
| The American Revolution | 0 | - | 4.52 | 54,265 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,435 |
| Stephen Curry Quiz | 0 | - | 4.37 | 67,020 |
| History of Florida | 0 | - | 4.45 | 9,830 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,108 |
| Hawaiian Islands | 0 | - | 4.83 | 42,741 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,172 |
| History of Texas | 0 | - | 4.43 | 14,639 |
| LeBron James Trivia | 0 | - | 4.01 | 171,044 |
| LeBron... or Kobe? | 0 | - | 4.04 | 70,051 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,346 |
| American History Quotes #1 | 0 | - | 4.37 | 96,059 |
| People on Money - United States | 0 | - | 4.31 | 63,355 |
| American History Quotes #2 | 0 | - | 4.38 | 41,422 |
| Old West History | 0 | - | 4.34 | 15,280 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,480 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,082 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,523 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,943 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,740 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,260 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,541,625 |
| U.S. State Flags | 0 | - | 4.88 | 170,761 |
| U.S. States that Border Canada | 0 | - | 4.91 | 185,173 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,157 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 220,995 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 134,364 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,556 |
| Cartoon Versions of U.S. States | 0 | - | 4.75 | 63,955 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,741 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,759 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,187 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,938 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,176 |
| Name a Valid U.S. President by Birth State | 0 | - | 4.60 | 9,782 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,855 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,617 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,024 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,147 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,409 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,647 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,943 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,812 |
| The Vietnam War | 0 | - | 4.44 | 35,549 |
| U.S. States Closest to Tokyo | 0 | - | 4.89 | 60,585 |
