| First Names of U.S. Presidents | 0 | - | 4.86 | 383,283 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,720,611 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 428,107 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,779 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,590 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,492 |
| Presidents that Beat Thomas Jefferson | 0 | - | 4.49 | 25,065 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,206 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,895 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,521 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,016 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 194,279 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,249 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,173 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,514 |
| Presidential Middle Names | 0 | - | 4.41 | 60,651 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,260 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,590 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,851 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,593 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.30 | 54,982 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,897 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 235,096 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,168 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,490 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,518 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,541 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,875 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,082 |
| U.S. President Scramble | 0 | - | 4.40 | 117,375 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,311 |
| Colonies of the Americas in 1775 with a Map | 0 | - | 4.88 | 19,897 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,845 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,346 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,740 |
| First Ladies of the United States | 0 | - | 4.28 | 85,904 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 24,044 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,293 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,410 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,335 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,076 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,777 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,485 |
| U.S. Presidents Who Added the Most Territory | 0 | - | 4.66 | 14,220 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,927 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,058 |
| Presidential Actors | 0 | - | 4.36 | 19,236 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 29,000 |
| U.S. History Timeline Quiz | 0 | - | 4.96 | 57,174 |
| The George Washington Presidency | 0 | - | 4.03 | 14,595 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,769 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,741 |
| The John Adams Presidency | 0 | - | 4.12 | 8,778 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,976 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,768 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,371 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,748 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,911 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,619 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 303,616 |
| U.S. Presidents by State | 0 | - | 4.34 | 68,810 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,232 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,293 |
| United States Map Quiz | 0 | - | 4.98 | 4,168,697 |
| Random U.S. States on a Map | 0 | - | 4.96 | 629,492 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,430 |
| Top 100 Harry Potter Characters by Mention | 0 | - | 4.93 | 396,690 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,605 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 84,089 |
| Name a Valid U.S. President by Birth State | 0 | - | 4.60 | 9,845 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,800 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,665 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,937 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,847 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,140 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,640 |
| The Kennedy Family | 0 | - | 3.90 | 14,093 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 74,855 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,202 |
| US States Quiz | 0 | - | 5.00 | 16,970,721 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,373 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 217,884 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,159 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,157 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,918 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,580 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,691 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,445 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,064 |
| Harry Potter Last Names | 0 | - | 4.64 | 951,270 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 119,490 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 128,224 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,381 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,221 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,357 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,970 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 334,805 |
| Pixelated United States Map | 0 | - | 4.88 | 94,704 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,360 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,309 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,132 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,059 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,854 |
| Win the U.S. Presidential Election | 0 | - | 4.78 | 634,221 |
| American Revolution Decoder | 0 | - | 4.12 | 20,985 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,629 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,567 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,348 |
| The Most Recent... United States | 0 | - | 4.46 | 18,551 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,898 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 112,119 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,124 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,146 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,147 |
| U.S. States By Population | 0 | - | 4.92 | 154,028 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,075 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,801 |
| US States with an Empty Map | 0 | - | 5.00 | 627,781 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,976 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,771 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,482 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,001 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,551 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,117 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,595 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,779 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,593 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,926 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,560 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,550 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,670 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,295 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,767 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,543 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,981 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 55,115 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,378 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,617 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,353 |
| Rivers of the United States | 0 | - | 4.93 | 66,579 |
| Names of Generations | 0 | - | 4.09 | 45,432 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,587 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,045 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,425 |
| U.S. Senators by State | 0 | - | 4.44 | 40,080 |
| Top 10 U.S. States by Republican Party Support | 0 | - | 4.44 | 75,750 |
| Top 10 U.S. States by Democratic Party Support | 0 | - | 4.63 | 81,609 |
| Top 10 U.S. Swing States in the 2024 Election | 0 | - | 4.51 | 75,393 |
| American Founding Fathers | 0 | - | 4.42 | 23,267 |
| The American Revolution | 0 | - | 4.52 | 54,333 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,975 |
| Stephen Curry Quiz | 0 | - | 4.37 | 67,261 |
| History of Florida | 0 | - | 4.45 | 9,866 |
| Hawaiian Islands | 0 | - | 4.83 | 42,891 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,500 |
| History of Texas | 0 | - | 4.43 | 14,679 |
| LeBron James Trivia | 0 | - | 4.01 | 171,482 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,474 |
| American History Quotes #1 | 0 | - | 4.37 | 96,173 |
| People on Money - United States | 0 | - | 4.31 | 63,416 |
| American History Quotes #2 | 0 | - | 4.38 | 41,489 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,569 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,184 |
| Events in U.S. History | 0 | - | 4.41 | 28,792 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,180 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,767 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,322 |
| The American Civil War | 0 | - | 4.62 | 52,599 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 509,378 |
| U.S. State Flags | 0 | - | 4.89 | 172,345 |
| U.S. States that Border Canada | 0 | - | 4.91 | 186,337 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,159 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,282 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,998 |
| Most Common Immigrant Origin by U.S. State | 0 | - | 4.90 | 67,943 |
| Draw All US State Borders | 0 | - | 4.99 | 140,167 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,740 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,355 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,699 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,338 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,956 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,164 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 79,115 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,379 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,863 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 162,149 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,982 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,318 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,505 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,425 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,222 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,978 |
| Shakespeare Quotes | 0 | - | 4.43 | 71,532 |
| Shakespearean Phrases | 0 | - | 4.57 | 36,855 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,106 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,413 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,276 |
| The Vietnam War | 0 | - | 4.44 | 35,630 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,768 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,832 |
