| U.S. Presidents by Picture | 0 | - | 4.87 | 426,126 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,196 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,260 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,694 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,691,734 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,123 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,647 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 193,453 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,162 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,743 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,509 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,483 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,443 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,481 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,811 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,009 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,378 |
| Presidential Actors | 0 | - | 4.36 | 19,160 |
| U.S. President Scramble | 0 | - | 4.40 | 116,696 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,199 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,188 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,593 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,333 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,674 |
| Presidential Middle Names | 0 | - | 4.41 | 60,159 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,235 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,507 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,383 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,955 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,916 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,856 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 234,255 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,807 |
| Random U.S. States on a Map | 0 | - | 4.96 | 625,637 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,133 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,245 |
| First Ladies of the United States | 0 | - | 4.28 | 85,579 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,937 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,211 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,993 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,172 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,944 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,542 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,621 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,186 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,809 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 302,154 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,260 |
| United States Map Quiz | 0 | - | 4.98 | 4,155,214 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,614 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,041 |
| The George Washington Presidency | 0 | - | 4.03 | 14,539 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,718 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,632 |
| The John Adams Presidency | 0 | - | 4.12 | 8,739 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,924 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,733 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,311 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,663 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,843 |
| Colonies of the Americas in 1775 with a Map | 0 | - | 4.88 | 19,530 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,311 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,678 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,914 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,480 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,660 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,639 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,705 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,402 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,845 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,273 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,397 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,378 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,292 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 243,487 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 331,396 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,067 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,834 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,771 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,830 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,145 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,859 |
| US States Quiz | 0 | - | 5.00 | 16,847,273 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,753 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,007 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 79,512 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,417 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,811 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,714 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,828 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,370 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,184 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,125 |
| Pixelated United States Map | 0 | - | 4.87 | 94,139 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 109,452 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,586 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,220 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,671 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,591 |
| The Kennedy Family | 0 | - | 3.90 | 14,065 |
| American Revolution Decoder | 0 | - | 4.10 | 20,946 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,305 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,098 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,981 |
| The Most Recent... United States | 0 | - | 4.45 | 18,420 |
| The American Civil War | 0 | - | 4.62 | 52,390 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,718 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 505,880 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,253 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,270 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,799 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,067 |
| U.S. States By Population | 0 | - | 4.92 | 153,383 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,283 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,365 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,459 |
| US States with an Empty Map | 0 | - | 5.00 | 623,739 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,429 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,192 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,139 |
| Draw All US State Borders | 0 | - | 4.99 | 136,974 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,521 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,841 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,623 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,107 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,449 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,150 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,650 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,378 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,436 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 78,356 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,846 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,998 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,246 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,583 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,009 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,999 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,678 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,168 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,445 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,260 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,770 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,592 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,143 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,726 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,144 |
| Rivers of the United States | 0 | - | 4.93 | 66,104 |
| Names of Generations | 0 | - | 4.10 | 44,562 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,045 |
| U.S. Presidents by State | 0 | - | 4.34 | 68,659 |
| American Founding Fathers | 0 | - | 4.42 | 23,209 |
| The American Revolution | 0 | - | 4.52 | 54,226 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,184 |
| Stephen Curry Quiz | 0 | - | 4.37 | 66,859 |
| History of Florida | 0 | - | 4.45 | 9,819 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,100 |
| Hawaiian Islands | 0 | - | 4.83 | 42,669 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,022 |
| History of Texas | 0 | - | 4.43 | 14,614 |
| LeBron James Trivia | 0 | - | 4.01 | 170,748 |
| LeBron... or Kobe? | 0 | - | 4.04 | 69,837 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,287 |
| American History Quotes #1 | 0 | - | 4.37 | 95,981 |
| People on Money - United States | 0 | - | 4.31 | 63,328 |
| American History Quotes #2 | 0 | - | 4.38 | 41,382 |
| Old West History | 0 | - | 4.33 | 15,261 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,427 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,014 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,517 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,920 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,715 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,223 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,535,450 |
| U.S. State Flags | 0 | - | 4.89 | 170,002 |
| U.S. States that Border Canada | 0 | - | 4.91 | 184,555 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,599 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 220,519 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 133,979 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,305 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,552 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,485 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,876 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,854 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,044 |
| Name a Valid U.S. President by Birth State | 0 | - | 4.60 | 9,755 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,687 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,332 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,816 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,986 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 73,838 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,563 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,791 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,564 |
| The Vietnam War | 0 | - | 4.44 | 35,495 |
| U.S. States Closest to Tokyo | 0 | - | 4.89 | 60,321 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,385 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 127,437 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 219,473 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,475 |
| Territories of the United States | 0 | - | 4.79 | 52,350 |
