| U.S. Presidents by Picture | 0 | - | 4.87 | 424,482 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,836 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 380,059 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,666,836 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,540 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,109 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,055 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 192,851 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,064 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,882 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,385 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,387 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,509 |
| Presidential Actors | 0 | - | 4.36 | 19,097 |
| The Bill Clinton Presidency | 0 | - | 4.22 | 31,380 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,436 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,745 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 21,943 |
| U.S. President Scramble | 0 | - | 4.40 | 116,369 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,286 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,926 |
| U.S. Vice Presidents | 0 | - | 4.39 | 135,406 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,152 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,760 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,205 |
| Presidential Middle Names | 0 | - | 4.41 | 59,843 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,885 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,015 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,234 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,813 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,579 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,746 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 233,625 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,108 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 83,332 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,184 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.49 | 28,656 |
| Random U.S. States on a Map | 0 | - | 4.96 | 622,889 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,186 |
| First Ladies of the United States | 0 | - | 4.28 | 85,323 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,845 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,140 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,555 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,050 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,859 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,418 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,574 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,818 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,719 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 300,519 |
| United States Map Quiz | 0 | - | 4.98 | 4,145,864 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,526 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,973 |
| The George Washington Presidency | 0 | - | 4.03 | 14,491 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,674 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,542 |
| The John Adams Presidency | 0 | - | 4.12 | 8,693 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,895 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,701 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,249 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,626 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,795 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,340 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,473 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,033 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,081 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,380 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,227 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,158 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,104 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,435 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,621 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,879 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,050 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,530 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,745 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 329,112 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,920 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,610 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,686 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,268 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,810 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,623 |
| US States Quiz | 0 | - | 5.00 | 16,749,675 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,797 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,296 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,697 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,762 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,356 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,250 |
| Countries in the Byzantine Empire | 0 | - | 4.95 | 71,840 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,262 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,639 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,857 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,895 |
| Pixelated United States Map | 0 | - | 4.89 | 93,695 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,792 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,105 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,679 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,929 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,548 |
| The Kennedy Family | 0 | - | 3.90 | 14,035 |
| American Revolution Decoder | 0 | - | 4.10 | 20,892 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,095 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,029 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,638 |
| The Most Recent... United States | 0 | - | 4.45 | 18,340 |
| The American Civil War | 0 | - | 4.62 | 52,230 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,109 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 503,256 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,725 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,741 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,103 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,346 |
| U.S. States By Population | 0 | - | 4.92 | 152,639 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,714 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,053 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,919 |
| US States with an Empty Map | 0 | - | 5.00 | 620,435 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,034 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,804 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,901 |
| Draw All US State Borders | 0 | - | 4.99 | 134,601 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 65,120 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,291 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,221 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,662 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,164 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,800 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,264 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,084 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 66,986 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,100 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,313 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,733 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,003 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 53,624 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,538 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,262 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,704 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,002 |
| James Bond Countries Visited Map | 0 | - | 4.99 | 63,755 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,680 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,396 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,381 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,864 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,438 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,673 |
| Rivers of the United States | 0 | - | 4.93 | 65,707 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,680 |
| U.S. Presidents by State | 0 | - | 4.34 | 68,544 |
| American Founding Fathers | 0 | - | 4.41 | 23,092 |
| The American Revolution | 0 | - | 4.52 | 54,120 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,627 |
| Stephen Curry Quiz | 0 | - | 4.36 | 66,513 |
| History of Florida | 0 | - | 4.45 | 9,781 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,072 |
| Hawaiian Islands | 0 | - | 4.83 | 42,512 |
| Countries Closest to Maine | 0 | - | 4.84 | 66,640 |
| History of Texas | 0 | - | 4.43 | 14,570 |
| LeBron James Trivia | 0 | - | 4.01 | 170,148 |
| LeBron... or Kobe? | 0 | - | 4.04 | 69,410 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,170 |
| American History Quotes #1 | 0 | - | 4.37 | 95,747 |
| People on Money - United States | 0 | - | 4.31 | 63,236 |
| American History Quotes #2 | 0 | - | 4.38 | 41,253 |
| Old West History | 0 | - | 4.33 | 15,235 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,303 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,780 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,503 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,876 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,663 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,122 |
| Fifty US States in One Minute | 0 | - | 4.56 | 3,523,823 |
| U.S. State Flags | 0 | - | 4.89 | 168,174 |
| U.S. States that Border Canada | 0 | - | 4.91 | 183,187 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 207,285 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 219,139 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,979 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 48,829 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,100 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,934 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,357 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,644 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,795 |
| Name a Valid U.S. President by Birth State | 0 | - | 4.60 | 9,698 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,715 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,682 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,920 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,381 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,510 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,064 |
| The Vietnam War | 0 | - | 4.43 | 35,357 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,107 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 127,016 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 217,579 |
| U.S. State Nicknames Quiz | 0 | - | 4.47 | 50,349 |
| Territories of the United States | 0 | - | 4.79 | 52,222 |
| Countries with American Expatriates | 0 | - | 4.53 | 42,502 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.78 | 39,446 |
