| U.S. Presidents by Picture | 0 | - | 4.87 | 424,085 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,750 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,659,728 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,776 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,382 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 190,082 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,486 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,039 |
| U.S. Vice Presidents | 0 | - | 4.41 | 135,147 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,041 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,623 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,075 |
| Presidential Middle Names | 0 | - | 4.41 | 59,757 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,039 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,806 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 93,899 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,195 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 192,671 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,504 |
| U.S. Presidents by State | 0 | - | 4.34 | 68,504 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,767 |
| Name a Valid U.S. President by Birth State | 0 | - | 4.60 | 9,681 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,528 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,497 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.49 | 28,627 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,720 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,172 |
| First Ladies of the United States | 0 | - | 4.28 | 85,278 |
| The Bill Clinton Presidency | 0 | - | 4.22 | 31,364 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,425 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,728 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 21,929 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,823 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,122 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,423 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,018 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,848 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,398 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,699 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,370 |
| Presidential Actors | 0 | - | 4.36 | 19,075 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,091 |
| U.S. President Scramble | 0 | - | 4.40 | 116,266 |
| United States Map Quiz | 0 | - | 4.98 | 4,143,597 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,487 |
| The George Washington Presidency | 0 | - | 4.03 | 14,481 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,666 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,520 |
| The John Adams Presidency | 0 | - | 4.12 | 8,683 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,879 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,689 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,233 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,616 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,783 |
| Random U.S. States on a Map | 0 | - | 4.96 | 622,116 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 83,240 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,222 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,413 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,267 |
| US States Quiz | 0 | - | 5.00 | 16,721,209 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,764 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,941 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,300 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,018 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,020 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,231 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,460 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,747 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,943 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,326 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 241,247 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 328,526 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,893 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,564 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,674 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,145 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,694 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,552 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,464 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 233,315 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,077 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,534 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,570 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,212 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,119 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,082 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,473 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,049 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,755 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,840 |
| Rivers of the United States | 0 | - | 4.93 | 65,594 |
| Pixelated United States Map | 0 | - | 4.89 | 93,582 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,606 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 90,950 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,531 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,714 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,964 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,539 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,182 |
| The Kennedy Family | 0 | - | 3.90 | 14,027 |
| American Founding Fathers | 0 | - | 4.41 | 23,083 |
| The American Revolution | 0 | - | 4.52 | 54,073 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,417 |
| Countries Closest to Maine | 0 | - | 4.84 | 66,514 |
| Six Flags Over Texas | 0 | - | 4.79 | 63,041 |
| People on Money - United States | 0 | - | 4.31 | 63,222 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,269 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,754 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,010 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,654 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,550 |
| The Most Recent... United States | 0 | - | 4.45 | 18,310 |
| The American Civil War | 0 | - | 4.62 | 52,185 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,859 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 502,420 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,477 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,519 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,814 |
| U.S. States that Start with M | 0 | - | 4.93 | 186,067 |
| U.S. States By Population | 0 | - | 4.92 | 152,470 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,521 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,942 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,698 |
| US States with an Empty Map | 0 | - | 5.00 | 619,493 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 206,948 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 81,950 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 48,668 |
| Cartoon Versions of U.S. States | 0 | - | 4.77 | 63,591 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,637 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,803 |
| Draw All US State Borders | 0 | - | 4.99 | 134,021 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 64,962 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 123,978 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 158,973 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,134 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,788 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,557 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,106 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,712 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,184 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,161 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 81,993 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.84 | 66,893 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,596 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 94,871 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,075 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,613 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 102,839 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,599 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 53,533 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,451 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,192 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,596 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,917 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,499 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,297 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,326 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,924 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,784 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,346 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,537 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 54,010 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 217,081 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 117,501 |
| Most Common High School Mascots | 0 | - | 4.47 | 31,865 |
| History of Florida | 0 | - | 4.45 | 9,771 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,065 |
| Hawaiian Islands | 0 | - | 4.83 | 42,454 |
| History of Texas | 0 | - | 4.43 | 14,561 |
| History of Pennsylvania | 0 | - | 4.16 | 7,093 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,109 |
| History of Virginia | 0 | - | 4.31 | 11,560 |
| American History Quotes #1 | 0 | - | 4.37 | 95,719 |
| American History Quotes #2 | 0 | - | 4.38 | 41,240 |
| Old West History | 0 | - | 4.33 | 15,229 |
| Events in U.S. History | 0 | - | 4.40 | 28,504 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,496 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,859 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,091 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,735 |
| Fifty US States in One Minute | 0 | - | 4.56 | 3,520,958 |
| U.S. State Flags | 0 | - | 4.89 | 167,658 |
| U.S. States that Border Canada | 0 | - | 4.91 | 182,736 |
| Mississippi River States Empty Map Quiz | 0 | - | 4.81 | 55,644 |
| Category Elimination - U.S. States #1 | 0 | - | 4.88 | 218,751 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,685 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,718 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,563 |
| Countries of Europe After World War II | 0 | - | 4.99 | 186,873 |
| Countries of Europe Before World War I | 0 | - | 4.99 | 155,492 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 88,137 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,671 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,329 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,434 |
| Modern-Day Countries of the Roman Empire on a Map | 0 | - | 4.99 | 124,869 |
| Shakespeare Quotes | 0 | - | 4.43 | 71,166 |
| Countries of Asia in 1900 | 0 | - | 4.50 | 57,658 |
| The Vietnam War | 0 | - | 4.43 | 35,323 |
| Countries of the Japanese Empire | 0 | - | 4.97 | 103,898 |
| Communist Countries in History | 0 | - | 4.63 | 492,874 |
