| U.S. Presidents by Picture | 0 | - | 4.87 | 423,753 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,579 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,676 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,861 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,654,567 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,480 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,035 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,364 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,089 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,379 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,422 |
| The Bill Clinton Presidency | 0 | - | 4.22 | 31,352 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,419 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,721 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 21,923 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,448 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,026 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.49 | 28,596 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,695 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,362 |
| U.S. President Scramble | 0 | - | 4.40 | 116,205 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 192,556 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,825 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,257 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,942 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,951 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,502 |
| Presidential Actors | 0 | - | 4.36 | 19,066 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,001 |
| Presidential Middle Names | 0 | - | 4.41 | 59,704 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,816 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,739 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,822 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,746 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,174 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 233,200 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,166 |
| First Ladies of the United States | 0 | - | 4.28 | 85,245 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,112 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,299 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,002 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,833 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,688 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,178 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,257 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 300,040 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,461 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,661 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,502 |
| The John Adams Presidency | 0 | - | 4.12 | 8,676 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,682 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,773 |
| United States Map Quiz | 0 | - | 4.98 | 4,141,898 |
| The George Washington Presidency | 0 | - | 4.03 | 14,475 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,870 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,214 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,609 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,838 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,005 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,216 |
| U.S. State Border Crossings | 0 | - | 4.97 | 95,962 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,329 |
| Third Most Common Language by U.S. State | 0 | - | 4.89 | 113,380 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,873 |
| U.S. Presidents by State | 0 | - | 4.34 | 68,485 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,077 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,494 |
| US States Quiz | 0 | - | 5.00 | 16,701,297 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,276 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,446 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,950 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,428 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,419 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,114 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,021 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,240 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,901 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,681 |
| Name the U.S. National Parks | 0 | - | 4.86 | 58,982 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,662 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,159 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 240,923 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 328,016 |
| Pixelated United States Map | 0 | - | 4.89 | 93,483 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,468 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 90,856 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,882 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,526 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,670 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,959 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,528 |
| The Kennedy Family | 0 | - | 3.90 | 14,026 |
| American Revolution Decoder | 0 | - | 4.10 | 20,878 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,624 |
| Six Flags Over Texas | 0 | - | 4.79 | 63,014 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,484 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,736 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,366 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,421 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,674 |
| U.S. States that Start with M | 0 | - | 4.93 | 185,910 |
| U.S. States By Population | 0 | - | 4.92 | 152,372 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,405 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,867 |
| US States with an Empty Map | 0 | - | 5.00 | 618,851 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 81,907 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,555 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,766 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 64,887 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 158,884 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,082 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,493 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,070 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,661 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.84 | 66,836 |
| Name a Valid U.S. President by Birth State | 0 | - | 4.60 | 9,668 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,375 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,878 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,142 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,496 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,288 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 83,181 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,280 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,807 |
| Rivers of the United States | 0 | - | 4.93 | 65,520 |
| Countries Closest to United States A-Z | 0 | - | 4.81 | 117,418 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,420 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,582 |
| U.S. Senators by State | 0 | - | 4.45 | 39,756 |
| American Founding Fathers | 0 | - | 4.41 | 23,074 |
| The American Revolution | 0 | - | 4.52 | 54,057 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,318 |
| Stephen Curry Quiz | 0 | - | 4.36 | 66,358 |
| History of Florida | 0 | - | 4.45 | 9,764 |
| Hawaiian Islands | 0 | - | 4.83 | 42,427 |
| Countries Closest to Maine | 0 | - | 4.84 | 66,448 |
| History of Texas | 0 | - | 4.43 | 14,554 |
| LeBron James Trivia | 0 | - | 4.01 | 169,896 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,089 |
| American History Quotes #1 | 0 | - | 4.37 | 95,690 |
| People on Money - United States | 0 | - | 4.31 | 63,206 |
| American History Quotes #2 | 0 | - | 4.38 | 41,223 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,242 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,731 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 32,994 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,645 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,078 |
| The American Civil War | 0 | - | 4.62 | 52,160 |
| Biggest Cities in the Confederate States in 1860 | 0 | - | 4.41 | 23,554 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 501,885 |
| U.S. State Flags | 0 | - | 4.89 | 167,107 |
| U.S. States that Border Canada | 0 | - | 4.91 | 182,460 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,587 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 206,713 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 48,581 |
| Draw All US State Borders | 0 | - | 4.99 | 133,625 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 123,871 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,659 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,066 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,096 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 81,937 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,552 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,656 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 94,719 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,472 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 131,949 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,493 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 102,629 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,381 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,842 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 491,418 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,298 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,217 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,813 |
| The Vietnam War | 0 | - | 4.43 | 35,294 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,733 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,449 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,945 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 126,750 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 216,723 |
| Territories of the United States | 0 | - | 4.79 | 52,145 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.78 | 39,379 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 174,552 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,302 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 51,742 |
| Name a Valid Answer - United States #1 | 0 | - | 4.61 | 93,448 |
| Most Common High School Mascots | 0 | - | 4.47 | 31,831 |
| Three Real and One Fake - U.S. History | 0 | - | 4.33 | 25,679 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,057 |
| New York City Geography | 0 | - | 4.42 | 32,936 |
| LeBron... or Kobe? | 0 | - | 4.04 | 69,200 |
| History of Pennsylvania | 0 | - | 4.16 | 7,087 |
| History of Virginia | 0 | - | 4.31 | 11,556 |
| Old West History | 0 | - | 4.33 | 15,223 |
| The Life of Thomas Edison | 0 | - | 4.03 | 4,895 |
| Events in U.S. History | 0 | - | 4.40 | 28,480 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,490 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,853 |
| U.S. History Multiple Choice #2 | 0 | - | 4.32 | 24,988 |
| U.S. History Multiple Choice #1 | 0 | - | 4.31 | 22,156 |
