| U.S. Presidents by Picture | 0 | - | 4.87 | 426,664 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,968 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,346 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,701,382 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,276 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,951 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,594 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,145 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,699 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,199 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,757 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,510 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,200 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 193,689 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,852 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,910 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,782 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,559 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 93,853 |
| Presidential Middle Names | 0 | - | 4.41 | 60,311 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,468 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,499 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,833 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,024 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,384 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,622 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,016 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,450 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 234,481 |
| U.S. Presidents by State | 0 | - | 4.34 | 68,701 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 305,068 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,064 |
| Colonies of the Americas in 1775 with a Map | 0 | - | 4.88 | 19,625 |
| Random U.S. States on a Map | 0 | - | 4.96 | 626,802 |
| Name a Valid U.S. President by Birth State | 0 | - | 4.60 | 9,782 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,318 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,265 |
| Presidential Actors | 0 | - | 4.36 | 19,181 |
| First Ladies of the United States | 0 | - | 4.28 | 85,674 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,233 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 77,133 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,213 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,977 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,412 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,837 |
| Top 100 Harry Potter Characters by Mention | 0 | - | 4.93 | 394,437 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,961 |
| U.S. President Scramble | 0 | - | 4.40 | 116,819 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,869 |
| Harry Potter Last Names | 0 | - | 4.64 | 949,564 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,648 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,737 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,654 |
| The John Adams Presidency | 0 | - | 4.12 | 8,750 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,744 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,859 |
| United States Map Quiz | 0 | - | 4.98 | 4,160,137 |
| The George Washington Presidency | 0 | - | 4.03 | 14,550 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,937 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,205 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,328 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,689 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,651 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,397 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,767 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,267 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 127,774 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,517 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,542 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,756 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,510 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 74,168 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,967 |
| US States Quiz | 0 | - | 5.00 | 16,887,212 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 367,200 |
| Random Sequential European Countries on a Map | 0 | - | 4.99 | 217,311 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 69,339 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 150,487 |
| Countries of Europe in 1848 | 0 | - | 4.99 | 82,367 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,786 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,099 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,965 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,777 |
| Random Sequential Asian Countries on a Map | 0 | - | 4.99 | 119,116 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,925 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,311 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,979 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,715 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,586 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 244,259 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 332,362 |
| Pixelated United States Map | 0 | - | 4.87 | 94,325 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 109,754 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,828 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,081 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,898 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,814 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,064 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,609 |
| The Kennedy Family | 0 | - | 3.90 | 14,074 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,269 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,387 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,091 |
| The Most Recent... United States | 0 | - | 4.45 | 18,462 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,965 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,503 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,509 |
| U.S. States with Short Names | 0 | - | 4.91 | 149,089 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,384 |
| U.S. States By Population | 0 | - | 4.92 | 153,608 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,520 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,475 |
| US States with an Empty Map | 0 | - | 5.00 | 625,004 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,585 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,374 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,242 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,673 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,103 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,823 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,288 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,586 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,313 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,603 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,189 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 61,166 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,081 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,915 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,332 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,721 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,691 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,849 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,188 |
| Rivers of the United States | 0 | - | 4.93 | 66,229 |
| Names of Generations | 0 | - | 4.09 | 44,999 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,217 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,503 |
| Countries that Beat the United States | 0 | - | 4.93 | 167,559 |
| American Founding Fathers | 0 | - | 4.42 | 23,230 |
| The American Revolution | 0 | - | 4.52 | 54,263 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,404 |
| History of Florida | 0 | - | 4.45 | 9,828 |
| Hawaiian Islands | 0 | - | 4.83 | 42,732 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,143 |
| History of Texas | 0 | - | 4.43 | 14,636 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,336 |
| American History Quotes #1 | 0 | - | 4.37 | 96,048 |
| People on Money - United States | 0 | - | 4.31 | 63,354 |
| American History Quotes #2 | 0 | - | 4.38 | 41,415 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,474 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,077 |
| Events in U.S. History | 0 | - | 4.41 | 28,683 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,118 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,738 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,251 |
| The American Civil War | 0 | - | 4.62 | 52,439 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 506,900 |
| U.S. State Flags | 0 | - | 4.88 | 170,688 |
| U.S. States that Border Canada | 0 | - | 4.91 | 185,102 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,669 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 209,088 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,531 |
| Cartoon Versions of U.S. States | 0 | - | 4.75 | 63,938 |
| Draw All US State Borders | 0 | - | 4.99 | 137,825 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,703 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,716 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,153 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,817 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,514 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,929 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 78,591 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,158 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,147 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,570 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 133,298 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,454 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,856 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,126 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,919 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,601 |
| Shakespeare Quotes | 0 | - | 4.43 | 71,420 |
| Shakespearean Phrases | 0 | - | 4.57 | 36,754 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,495 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,962 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,781 |
| The Vietnam War | 0 | - | 4.44 | 35,541 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,277 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,341 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,481 |
| Random African Countries on a Map | 0 | - | 4.99 | 296,363 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 220,253 |
| Territories of the United States | 0 | - | 4.80 | 52,421 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,698 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 175,519 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,335 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,211 |
| Name a Valid Answer - United States #1 | 0 | - | 4.61 | 94,037 |
| Most Common High School Mascots | 0 | - | 4.47 | 32,144 |
| Three Real and One Fake - U.S. History | 0 | - | 4.33 | 25,777 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,108 |
| New York City Geography | 0 | - | 4.42 | 33,109 |
