| First Names of U.S. Presidents | 0 | - | 4.86 | 355,531 |
| U.S. Presidents by Picture | 0 | - | 4.85 | 397,050 |
| Play-Doh Presidents | 0 | - | 5.00 | 75,805 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,205,997 |
| Name a Valid U.S. President #1 | 0 | - | 4.93 | 169,140 |
| US Presidents - 1 Minute Sprint | 0 | - | 4.41 | 281,474 |
| The John F. Kennedy Presidency | 0 | - | 4.45 | 41,166 |
| U.S. President Scramble | 0 | - | 4.37 | 91,838 |
| U.S. Presidential Quotes | 0 | - | 4.36 | 42,842 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.47 | 21,046 |
| Name a Valid U.S. President #2 | 0 | - | 4.52 | 61,928 |
| U.S. Vice Presidents | 0 | - | 4.41 | 121,089 |
| U.S. Presidential Trivia #1 | 0 | - | 4.51 | 97,895 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.57 | 82,598 |
| The George W. Bush Presidency | 0 | - | 4.06 | 31,003 |
| U.S. Presidential Trivia #2 | 0 | - | 4.52 | 40,265 |
| Assassinated U.S. Presidents | 0 | - | 4.54 | 80,669 |
| People in Pictures with Ronald Reagan | 0 | - | 4.36 | 37,762 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 33,700 |
| The Barack Obama Presidency | 0 | - | 4.17 | 23,730 |
| Presidential Actors | 0 | - | 4.33 | 17,910 |
| The Bill Clinton Presidency | 0 | - | 4.18 | 30,271 |
| The George H. W. Bush Presidency | 0 | - | 4.35 | 20,619 |
| The Ronald Reagan Presidency | 0 | - | 4.25 | 23,714 |
| The Richard Nixon Presidency | 0 | - | 4.10 | 20,919 |
| The Jimmy Carter Presidency | 0 | - | 4.39 | 18,135 |
| Governors Who Ran For President | 0 | - | 4.47 | 18,964 |
| U.S. Presidents by Event | 0 | - | 4.58 | 29,309 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 26,001 |
| First Ladies of the United States | 0 | - | 4.27 | 80,378 |
| Presidential Middle Names | 0 | - | 4.37 | 56,383 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 24,936 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 65,655 |
| Random U.S. Vice President to President | 0 | - | 4.55 | 28,008 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.63 | 14,063 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.97 | 179,617 |
| Add a Letter - Make a U.S. President | 0 | - | 4.66 | 22,141 |
| People in Pictures with Barack Obama | 0 | - | 4.11 | 45,293 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.41 | 22,610 |
| U.S. Presidents Who Died in Office | 0 | - | 4.75 | 31,407 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 219,949 |
| George Bush... or George Bush | 0 | - | 3.89 | 7,741 |
| Random U.S. States on a Map | 0 | - | 4.95 | 504,173 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 12,926 |
| The John Adams Presidency | 0 | - | 4.10 | 8,024 |
| The Theodore Roosevelt Presidency | 0 | - | 4.33 | 7,172 |
| U.S. Vice Presidential Trivia | 0 | - | 4.31 | 11,560 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 123,016 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.73 | 19,312 |
| The George Washington Presidency | 0 | - | 4.02 | 13,694 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.34 | 10,730 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.32 | 16,905 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.32 | 20,604 |
| Random U.S. Presidents by Picture | 0 | - | 4.37 | 60,605 |
| Six Flags Over Texas | 0 | - | 4.84 | 59,175 |
| Deadliest U.S. Wars | 0 | - | 4.83 | 159,338 |
| George Washington... or George W. Bush? | 0 | - | 4.14 | 11,425 |
| United States Map Quiz | 0 | - | 4.98 | 3,923,632 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 276,850 |
| Vatican City Country Quiz | 0 | - | 4.50 | 39,743 |
| Countries of the Soviet Union | 0 | - | 4.98 | 185,728 |
| U.S. State Border Crossings | 0 | - | 4.96 | 82,716 |
| U.S. Citizenship Test Questions | 0 | - | 4.86 | 223,684 |
| Third Most Common Language by U.S. State | 0 | - | 4.90 | 107,892 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.84 | 34,291 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 66,040 |
| U.S. Senators by State | 0 | - | 4.49 | 36,465 |
| U.S. Presidents True or False | 0 | - | 3.94 | 14,651 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.20 | 30,441 |
| The Kennedy Family | 0 | - | 3.84 | 13,351 |
| Cities and Towns of Massachusetts | 0 | - | 4.90 | 61,615 |
| US States Quiz | 0 | - | 5.00 | 14,909,624 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.92 | 51,015 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 135,151 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 63,984 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.94 | 50,524 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 59,751 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 47,182 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 75,020 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.89 | 51,830 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 94,746 |
| Countries of Iberia in History with a Map | 0 | - | 4.82 | 34,677 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.96 | 76,606 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 101,589 |
| Asian Countries Americans Travel to the Most | 0 | - | 4.84 | 55,458 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 67,577 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 94,695 |
| Biggest Mongol Empire Countries | 0 | - | 4.91 | 67,912 |
| Total United States Immigration by Country | 0 | - | 4.89 | 97,591 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.93 | 148,503 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.94 | 187,578 |
| Pixelated United States Map | 0 | - | 4.90 | 83,070 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 94,597 |
| Countries that Visit the United States the Most | 0 | - | 4.95 | 79,738 |
| All U.S. Supreme Court Justices | 0 | - | 4.49 | 27,405 |
| U.S. Cabinet Departments | 0 | - | 4.85 | 67,972 |
| Win the U.S. Presidential Election | 0 | - | 4.79 | 518,154 |
| U.S. History for Dummies | 0 | - | 4.50 | 65,973 |
| The 13 Colonies Quiz | 0 | - | 4.96 | 101,466 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 97,305 |
| 10 Southernmost U.S. States | 0 | - | 4.85 | 100,351 |
| U.S. States with Short Names | 0 | - | 4.87 | 131,421 |
| U.S. States that Start with M | 0 | - | 4.91 | 151,986 |
| U.S. States By Population | 0 | - | 4.90 | 131,061 |
| U.S. States that Start with N | 0 | - | 4.95 | 156,531 |
| U.S. States with Longest Names | 0 | - | 4.84 | 36,571 |
| US States with an Empty Map | 0 | - | 5.00 | 560,014 |
| 10 Northernmost U.S. States | 0 | - | 4.89 | 74,492 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.97 | 342,202 |
| U.S. States with a Unique First Letter | 0 | - | 4.95 | 78,580 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 58,788 |
| The Only Remaining U.S. State . . . | 0 | - | 4.94 | 56,733 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 146,394 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 168,504 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.85 | 99,580 |
| Top 10 Least Obese U.S. States | 0 | - | 4.81 | 69,017 |
| The United States... or the United Kingdom? | 0 | - | 4.89 | 90,979 |
| Ultimate Harry Potter Name Game | 0 | - | 4.95 | 466,047 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 223,584 |
| Most-Visited Countries by Popes | 0 | - | 4.63 | 77,153 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 61,405 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 72,575 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 88,355 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 78,843 |
| 10 Longest Rivers in the United States | 0 | - | 4.82 | 35,289 |
| Rivers of the United States | 0 | - | 4.92 | 57,673 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.96 | 279,127 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 125,639 |
| Countries that Beat the United States | 0 | - | 4.92 | 147,284 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.43 | 69,672 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.69 | 74,437 |
| American Revolution Decoder | 0 | - | 4.12 | 20,070 |
| Countries Closest to Alaska | 0 | - | 4.92 | 99,957 |
| Hawaiian Islands Map Quiz | 0 | - | 4.88 | 21,180 |
| Countries Closest to Maine | 0 | - | 4.85 | 59,584 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.85 | 22,214 |
| People on Money - United States | 0 | - | 4.31 | 61,912 |
| U.S. History Groups of Two | 0 | - | 4.28 | 35,558 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 41,533 |
| The American Civil War | 0 | - | 4.63 | 49,344 |
| Word Scramble - U.S. States | 0 | - | 4.96 | 462,452 |
| Louisiana Purchase with a Map | 0 | - | 4.95 | 36,967 |
| Name a Valid U.S. State #1 | 0 | - | 4.95 | 186,670 |
| Great Plains States and Provinces on a Map | 0 | - | 4.94 | 38,801 |
| Draw All US State Borders | 0 | - | 4.99 | 96,383 |
| Top 10 Coldest U.S. States | 0 | - | 4.91 | 101,263 |
| Top 10 Hottest U.S. States | 0 | - | 4.83 | 101,782 |
| Top 10 Most Native American U.S. States | 0 | - | 4.84 | 72,092 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 90,439 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 73,927 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 57,342 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 72,385 |
| U.S. States or European Countries by Population | 0 | - | 4.98 | 116,928 |
| Countries that Bordered the USSR | 0 | - | 4.94 | 154,066 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 90,052 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 112,877 |
| Groups of Things - Harry Potter | 0 | - | 4.86 | 262,576 |
| Top 100 Harry Potter Characters by Mention | 0 | - | 4.93 | 352,234 |
| Countries of Asia in 1900 | 0 | - | 4.49 | 53,846 |
| The Vietnam War | 0 | - | 4.41 | 33,060 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 99,059 |
| Colonies of Africa with a Map | 0 | - | 4.79 | 48,846 |
| Most-Spoken Languages of the United States | 0 | - | 4.45 | 165,099 |
| Countries Closest to United States A-Z | 0 | - | 4.84 | 108,188 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.33 | 10,417 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.52 | 70,534 |
| The American Revolution | 0 | - | 4.51 | 51,923 |
| Stephen Curry Quiz | 0 | - | 4.35 | 60,116 |
| History of Florida | 0 | - | 4.44 | 8,786 |
| The Life of Martin Luther King Jr. | 0 | - | 4.80 | 10,423 |
| Hawaiian Islands | 0 | - | 4.85 | 38,733 |
| History of Texas | 0 | - | 4.41 | 13,559 |
| LeBron... or Kobe? | 0 | - | 4.10 | 54,535 |
| History of Pennsylvania | 0 | - | 4.09 | 6,489 |
| U.S. States that Border Tennessee | 0 | - | 4.84 | 57,998 |
| History of Virginia | 0 | - | 4.33 | 10,977 |
| American History Quotes #1 | 0 | - | 4.40 | 91,820 |
| American History Quotes #2 | 0 | - | 4.38 | 39,382 |
| Old West History | 0 | - | 4.28 | 14,812 |
| Events in U.S. History | 0 | - | 4.38 | 26,312 |
| Life of Benjamin Franklin | 0 | - | 4.20 | 6,237 |
| American Revolution - Multiple Choice | 0 | - | 4.32 | 18,910 |
| Embarrassing Chapters in US History | 0 | - | 4.15 | 31,596 |
| Last Names in U.S. History #1 | 0 | - | 4.24 | 34,378 |
| Last Names in U.S. History #2 | 0 | - | 4.42 | 16,113 |
| Fifty US States in One Minute | 0 | - | 4.57 | 3,273,011 |
| U.S. State Flags | 0 | - | 4.88 | 139,044 |
| U.S. States that Border Canada | 0 | - | 4.90 | 166,529 |
| Category Elimination - U.S. States #1 | 0 | - | 4.90 | 196,733 |
| Cartoon Versions of U.S. States | 0 | - | 4.82 | 52,804 |
| U.S. State Shapes Quiz #2 | 0 | - | 4.82 | 91,367 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 52,345 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 149,235 |
| Countries of Europe After World War II | 0 | - | 4.98 | 172,443 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 140,952 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 77,848 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 58,571 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.91 | 100,373 |
| Biggest Roman Empire Countries | 0 | - | 4.88 | 82,653 |
| Communist Countries in History | 0 | - | 4.65 | 459,135 |
