| U.S. Presidents by Picture | 0 | - | 4.87 | 426,985 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,448 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 192,539 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,707,126 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 382,260 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,793 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,215 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,943 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,326 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,196 |
| Presidents that Beat Thomas Jefferson | 0 | - | 4.49 | 24,981 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,210 |
| U.S. President Scramble | 0 | - | 4.40 | 116,908 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,977 |
| Presidential Actors | 0 | - | 4.36 | 19,197 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,422 |
| Random U.S. States on a Map | 0 | - | 4.96 | 627,695 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,534 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,911 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,694 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,973 |
| Presidential Middle Names | 0 | - | 4.41 | 60,393 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,157 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,441 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,659 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,477 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,210 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,044 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,338 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,744 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,333 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,450 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,278 |
| First Ladies of the United States | 0 | - | 4.28 | 85,727 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,478 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,512 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,842 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,037 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,243 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,229 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,234 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,997 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,638 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,044 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,390 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,854 |
| Vietnam War Countries | 0 | - | 4.82 | 94,349 |
| U.S. Senators by State | 0 | - | 4.44 | 39,996 |
| The American Revolution | 0 | - | 4.52 | 54,290 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 234,670 |
| United States Map Quiz | 0 | - | 4.98 | 4,163,153 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,672 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,114 |
| The George Washington Presidency | 0 | - | 4.03 | 14,561 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,747 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,668 |
| The John Adams Presidency | 0 | - | 4.12 | 8,760 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,947 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,747 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,704 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,869 |
| The Kennedy Family | 0 | - | 3.90 | 14,082 |
| Colonies of the Americas in 1775 with a Map | 0 | - | 4.88 | 19,706 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,453 |
| The Iraq War | 0 | - | 4.47 | 15,670 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,804 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,592 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,784 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 80,844 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,272 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,063 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,596 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,095 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,719 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,844 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,593 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,804 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,747 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 333,007 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,104 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,932 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,830 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 193,847 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,374 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,376 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,024 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,293 |
| US States Quiz | 0 | - | 5.00 | 16,912,847 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,768 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,700 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 83,229 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,048 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,289 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,113 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,235 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,947 |
| The Persian Gulf War | 0 | - | 4.02 | 8,460 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,397 |
| Most Guessed North American Teams by Sport | 0 | - | 4.28 | 64,599 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,227 |
| Pixelated United States Map | 0 | - | 4.88 | 94,438 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,913 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,969 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,658 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,787 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,617 |
| California A-Z | 0 | - | 4.49 | 28,806 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 46,997 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,436 |
| Events in U.S. History | 0 | - | 4.41 | 28,706 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,132 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,181 |
| The Most Recent... United States | 0 | - | 4.46 | 18,487 |
| The American Civil War | 0 | - | 4.62 | 52,491 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,116 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 507,744 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,682 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 113,646 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,300 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,608 |
| U.S. States By Population | 0 | - | 4.92 | 153,724 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,681 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,581 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,824 |
| US States with an Empty Map | 0 | - | 5.00 | 625,867 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,685 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,481 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,325 |
| Draw All US State Borders | 0 | - | 4.99 | 138,489 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,779 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,261 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,936 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,401 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,655 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,430 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,921 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,596 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,703 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 78,737 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,344 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,470 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,619 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,051 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,304 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,278 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 42,042 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,479 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,711 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,656 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,850 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,084 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,787 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,528 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,933 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,475 |
| Random American Countries on a Map | 0 | - | 4.96 | 99,751 |
| Rivers of the United States | 0 | - | 4.93 | 66,312 |
| Names of Generations | 0 | - | 4.09 | 45,165 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,327 |
| American Founding Fathers | 0 | - | 4.42 | 23,237 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,552 |
| History of Florida | 0 | - | 4.45 | 9,841 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,112 |
| Hawaiian Islands | 0 | - | 4.83 | 42,770 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,242 |
| History of Texas | 0 | - | 4.43 | 14,650 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,373 |
| American History Quotes #1 | 0 | - | 4.37 | 96,097 |
| People on Money - United States | 0 | - | 4.31 | 63,371 |
| American History Quotes #2 | 0 | - | 4.38 | 41,440 |
| Old West History | 0 | - | 4.34 | 15,285 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,503 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,115 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,525 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,950 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,747 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,273 |
| Fifty US States in One Minute | 0 | - | 4.61 | 3,544,043 |
| U.S. State Flags | 0 | - | 4.88 | 171,244 |
| U.S. States that Border Canada | 0 | - | 4.91 | 185,482 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,414 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 221,264 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 134,574 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,652 |
| Cartoon Versions of U.S. States | 0 | - | 4.75 | 64,002 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,258 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,895 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,312 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,984 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,218 |
| Midwestern States of the U.S. | 0 | - | 4.88 | 13,905 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,735 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 89,184 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,215 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.98 | 74,560 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,682 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,994 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 493,734 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,963 |
| The Vietnam War | 0 | - | 4.44 | 35,572 |
