| U.S. Presidents by Picture | 0 | - | 4.87 | 426,027 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,175 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,690,104 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 381,185 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 191,436 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,535 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,166 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,686 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,122 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,644 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,155 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 108,567 |
| U.S. Presidents by Event | 0 | - | 4.58 | 34,293 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 93,639 |
| Presidential Middle Names | 0 | - | 4.41 | 60,131 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,210 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,471 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,949 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,368 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,478 |
| Presidential Actors | 0 | - | 4.36 | 19,157 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,175 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 304,687 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,891 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,095 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,244 |
| U.S. Presidents by State | 0 | - | 4.34 | 68,655 |
| First Ladies of the United States | 0 | - | 4.28 | 85,555 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,441 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,479 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,809 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,005 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,930 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,205 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,969 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,169 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 193,419 |
| Add a Letter - Make a U.S. President | 0 | - | 4.57 | 23,941 |
| Name a Valid U.S. President by Birth State | 0 | - | 4.60 | 9,752 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,804 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 83,612 |
| U.S. President Scramble | 0 | - | 4.40 | 116,673 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 28,801 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,850 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,373 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 190,575 |
| United States Map Quiz | 0 | - | 4.98 | 4,154,675 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,605 |
| The George Washington Presidency | 0 | - | 4.03 | 14,538 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,716 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,623 |
| The John Adams Presidency | 0 | - | 4.12 | 8,737 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,922 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,730 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,307 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,661 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,838 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,299 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,259 |
| US States Quiz | 0 | - | 5.00 | 16,839,506 |
| Countries of the Soviet Union | 0 | - | 4.98 | 194,458 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,634 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 106,650 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,379 |
| Name the U.S. National Parks | 0 | - | 4.86 | 59,823 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 239,228 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,669 |
| Total United States Immigration by Country | 0 | - | 4.91 | 111,364 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,359 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 174,243 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 243,360 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 331,251 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,067 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,817 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,767 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,040 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,587 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,198 |
| The Kennedy Family | 0 | - | 3.90 | 14,064 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,790 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,112 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,291 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,839 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,956 |
| US States with an Empty Map | 0 | - | 5.00 | 623,514 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 366,673 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 234,195 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 68,849 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 149,938 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 76,982 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 64,341 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,748 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 56,650 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 115,784 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 117,285 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,164 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,120 |
| Rivers of the United States | 0 | - | 4.93 | 66,089 |
| Pixelated United States Map | 0 | - | 4.87 | 94,107 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 109,395 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 91,553 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,016 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 146,184 |
| Countries that Beat the United States | 0 | - | 4.93 | 166,606 |
| American Founding Fathers | 0 | - | 4.42 | 23,204 |
| The American Revolution | 0 | - | 4.52 | 54,224 |
| Countries Closest to Alaska | 0 | - | 4.93 | 124,146 |
| Hawaiian Islands | 0 | - | 4.83 | 42,660 |
| Countries Closest to Maine | 0 | - | 4.85 | 66,997 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,281 |
| People on Money - United States | 0 | - | 4.31 | 63,326 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,418 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,002 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,094 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,708 |
| The Most Recent... United States | 0 | - | 4.45 | 18,417 |
| The American Civil War | 0 | - | 4.62 | 52,383 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 117,672 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 505,687 |
| U.S. State Flags | 0 | - | 4.89 | 169,862 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 111,205 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 113,236 |
| U.S. States with Short Names | 0 | - | 4.91 | 148,747 |
| U.S. States that Start with M | 0 | - | 4.93 | 187,010 |
| U.S. States By Population | 0 | - | 4.92 | 153,034 |
| U.S. States that Start with N | 0 | - | 4.95 | 171,235 |
| U.S. States that Border Canada | 0 | - | 4.91 | 184,449 |
| U.S. States with Longest Names | 0 | - | 4.84 | 44,343 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 48,431 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 208,503 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,404 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 49,271 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,168 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,121 |
| Draw All US State Borders | 0 | - | 4.99 | 136,808 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 65,494 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 124,516 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 159,812 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,604 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 125,445 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,077 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,436 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,130 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 91,843 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,619 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,352 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,404 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,840 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,028 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 95,779 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 161,289 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 132,946 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 165,200 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 103,528 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,960 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,773 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.86 | 60,958 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,569 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,128 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 98,411 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 237,221 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,725 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,581 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 82,503 |
| The Vietnam War | 0 | - | 4.44 | 35,488 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,120 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,704 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,106 |
| Colonies of Africa with a Map | 0 | - | 4.78 | 54,361 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 127,395 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 219,332 |
| Territories of the United States | 0 | - | 4.79 | 52,342 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,595 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 175,299 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,328 |
| Names of Generations | 0 | - | 4.10 | 44,378 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,099 |
| Name a Valid Answer - United States #1 | 0 | - | 4.61 | 93,870 |
| Most Common High School Mascots | 0 | - | 4.47 | 32,059 |
| Three Real and One Fake - U.S. History | 0 | - | 4.33 | 25,761 |
| History of Florida | 0 | - | 4.45 | 9,814 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,099 |
| New York City Geography | 0 | - | 4.42 | 33,065 |
| History of Texas | 0 | - | 4.43 | 14,608 |
| History of Pennsylvania | 0 | - | 4.16 | 7,130 |
| History of Virginia | 0 | - | 4.31 | 11,590 |
| American History Quotes #1 | 0 | - | 4.37 | 95,974 |
| American History Quotes #2 | 0 | - | 4.38 | 41,379 |
| Old West History | 0 | - | 4.33 | 15,260 |
| Events in U.S. History | 0 | - | 4.40 | 28,632 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,517 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,917 |
| U.S. History Multiple Choice #2 | 0 | - | 4.32 | 25,054 |
| U.S. History Multiple Choice #1 | 0 | - | 4.31 | 22,229 |
| Valid Answer - U.S. History | 0 | - | 4.24 | 22,516 |
| U.S. History Multiple Choice #4 | 0 | - | 4.26 | 25,573 |
| Animals in American History | 0 | - | 4.20 | 28,003 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,219 |
| U.S. History Analogies | 0 | - | 4.31 | 17,482 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,162 |
