| U.S. Presidents Quiz | 0 | - | 5.00 | 3,718,909 |
| U.S. Presidents by Picture | 0 | - | 4.87 | 427,972 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,750 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,129 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 193,345 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,882 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,186 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,080 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,423 |
| Presidential Middle Names | 0 | - | 4.41 | 60,605 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,569 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,938 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,808 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,148 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,576 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,448 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,302 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,497 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,034 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,761 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,974 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,883 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,780 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,330 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,720 |
| First Ladies of the United States | 0 | - | 4.28 | 85,865 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 24,030 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,282 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,389 |
| U.S. President Scramble | 0 | - | 4.40 | 117,345 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,313 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,064 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,572 |
| U.S. Presidents Who Added the Most Territory | 0 | - | 4.66 | 14,202 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,913 |
| Presidents that Beat Thomas Jefferson | 0 | - | 4.49 | 25,059 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,583 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,256 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,201 |
| United States Map Quiz | 0 | - | 4.98 | 4,167,864 |
| Presidential Actors | 0 | - | 4.36 | 19,226 |
| The George Washington Presidency | 0 | - | 4.03 | 14,589 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,765 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,724 |
| The John Adams Presidency | 0 | - | 4.12 | 8,772 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,972 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,762 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,361 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,739 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,898 |
| Random U.S. States on a Map | 0 | - | 4.96 | 629,210 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,386 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 84,060 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,922 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,513 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,538 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,871 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,074 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 194,218 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,472 |
| US States Quiz | 0 | - | 5.00 | 16,962,718 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 235,047 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,074 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,035 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,288 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,771 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,339 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,607 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,164 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,806 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,292 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 245,806 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 334,567 |
| Pixelated United States Map | 0 | - | 4.88 | 94,655 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,275 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,245 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,130 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,050 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,852 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,136 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,636 |
| The Kennedy Family | 0 | - | 3.90 | 14,091 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 74,787 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,597 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,541 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,174 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,331 |
| The Most Recent... United States | 0 | - | 4.46 | 18,543 |
| The American Civil War | 0 | - | 4.62 | 52,585 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,806 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 509,132 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 112,029 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,042 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,690 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,052 |
| U.S. States By Population | 0 | - | 4.92 | 153,967 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,998 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,763 |
| US States with an Empty Map | 0 | - | 5.00 | 627,513 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,952 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,267 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,727 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,451 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,959 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,514 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,079 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,567 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,761 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,563 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,894 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,089 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 84,690 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,493 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,626 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,384 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,526 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,510 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,593 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,260 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,718 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,464 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,582 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,964 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 55,081 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,336 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,577 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,330 |
| Rivers of the United States | 0 | - | 4.93 | 66,541 |
| Names of Generations | 0 | - | 4.09 | 45,394 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,549 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,978 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,334 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,232 |
| American Founding Fathers | 0 | - | 4.42 | 23,262 |
| The American Revolution | 0 | - | 4.52 | 54,326 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,915 |
| History of Florida | 0 | - | 4.45 | 9,864 |
| Hawaiian Islands | 0 | - | 4.83 | 42,863 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,461 |
| History of Texas | 0 | - | 4.43 | 14,678 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,461 |
| American History Quotes #1 | 0 | - | 4.37 | 96,168 |
| People on Money - United States | 0 | - | 4.31 | 63,407 |
| American History Quotes #2 | 0 | - | 4.38 | 41,484 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,563 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,175 |
| Events in U.S. History | 0 | - | 4.41 | 28,782 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,172 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,767 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,315 |
| U.S. State Flags | 0 | - | 4.89 | 172,195 |
| U.S. States that Border Canada | 0 | - | 4.91 | 186,218 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,121 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,195 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 222,045 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 135,293 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,952 |
| Cartoon Versions of U.S. States | 0 | - | 4.75 | 64,094 |
| Draw All US State Borders | 0 | - | 4.99 | 139,912 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,690 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,311 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,657 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,289 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,925 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,143 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 79,067 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,356 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,793 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 162,073 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,901 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,510 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,258 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,438 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,387 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,977 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,784 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,194 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,934 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,042 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,382 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,242 |
| The Vietnam War | 0 | - | 4.44 | 35,623 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,745 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,788 |
| U.S. States Closest to Tokyo | 0 | - | 4.89 | 61,055 |
| U.S. History Multiple Choice #5 | 0 | - | 4.26 | 11,585 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 221,817 |
| U.S. State Nicknames | 0 | - | 4.47 | 50,668 |
| Territories of the United States | 0 | - | 4.80 | 52,556 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,646 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,823 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 175,949 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,351 |
| United States Landmarks Map Quiz | 0 | - | 4.55 | 40,261 |
| United States Country Quiz | 0 | - | 4.43 | 102,014 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,412 |
| Busiest Air Routes from the U.S. | 0 | - | 4.46 | 77,024 |
| Name a Valid Answer - United States #1 | 0 | - | 4.62 | 94,289 |
| Most Common High School Mascots | 0 | - | 4.47 | 32,259 |
| Three Real and One Fake - U.S. History | 0 | - | 4.33 | 25,821 |
