| U.S. Presidents by Picture | 0 | - | 4.87 | 423,431 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,632 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,688 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,650,727 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,423 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,461 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,010 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,681 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,272 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,349 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,081 |
| U.S. President Scramble | 0 | - | 4.40 | 116,156 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,809 |
| Presidential Actors | 0 | - | 4.36 | 19,051 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,241 |
| Random U.S. States on a Map | 0 | - | 4.96 | 621,049 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,820 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,353 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,886 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,400 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,943 |
| Presidential Middle Names | 0 | - | 4.41 | 59,659 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,023 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,691 |
| Assassinated U.S. Presidents | 0 | - | 4.61 | 93,769 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,149 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,177 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,721 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,777 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,430 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,200 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,160 |
| First Ladies of the United States | 0 | - | 4.28 | 85,213 |
| The Bill Clinton Presidency | 0 | - | 4.22 | 31,344 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,413 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,712 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 21,916 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,102 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,212 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 15,992 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,821 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,346 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,169 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,642 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,676 |
| Vietnam War Countries | 0 | - | 4.83 | 93,563 |
| U.S. Senators by State | 0 | - | 4.44 | 39,738 |
| The American Revolution | 0 | - | 4.52 | 54,042 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 233,097 |
| United States Map Quiz | 0 | - | 4.98 | 4,140,422 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,455 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,956 |
| The George Washington Presidency | 0 | - | 4.03 | 14,469 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,653 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,456 |
| The John Adams Presidency | 0 | - | 4.12 | 8,674 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,863 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,678 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,604 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,766 |
| The Kennedy Family | 0 | - | 3.90 | 14,021 |
| Colonies of the Americas in 1775 with a Map | 0 | - | 4.88 | 19,188 |
| Vatican City Country Quiz | 0 | - | 4.53 | 43,977 |
| The Iraq War | 0 | - | 4.47 | 15,544 |
| Third Most Common Language by U.S. State | 0 | - | 4.89 | 113,357 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,237 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,749 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,198 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,206 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,765 |
| U.S. State Border Crossings | 0 | - | 4.97 | 95,897 |
| Name the U.S. National Parks | 0 | - | 4.86 | 58,504 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,237 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,590 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,807 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,080 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 240,319 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 327,692 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,874 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,498 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,667 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 192,453 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 73,000 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,569 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,459 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,176 |
| US States Quiz | 0 | - | 5.00 | 16,687,630 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,147 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,837 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,340 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,300 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 70,036 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,948 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,704 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,166 |
| The Persian Gulf War | 0 | - | 4.02 | 8,398 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,626 |
| Most Guessed North American Teams by Sport | 0 | - | 4.28 | 63,728 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,781 |
| Pixelated United States Map | 0 | - | 4.89 | 93,409 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,361 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 90,780 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,330 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,454 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,524 |
| California A-Z | 0 | - | 4.49 | 28,701 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 46,473 |
| Six Flags Over Texas | 0 | - | 4.79 | 62,987 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 32,982 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,427 |
| The Most Recent... United States | 0 | - | 4.45 | 18,271 |
| The American Civil War | 0 | - | 4.62 | 52,110 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,630 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 501,437 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,283 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,330 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,558 |
| U.S. States that Start with M | 0 | - | 4.93 | 185,820 |
| U.S. States By Population | 0 | - | 4.92 | 152,293 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,314 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,810 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,495 |
| US States with an Empty Map | 0 | - | 5.00 | 618,397 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 81,857 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,484 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,730 |
| Draw All US State Borders | 0 | - | 4.99 | 133,313 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 64,819 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 158,812 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,047 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,428 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,041 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,630 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 101,020 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 81,894 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.84 | 66,780 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 94,613 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 131,840 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,414 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 102,461 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 53,404 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,321 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,098 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,441 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,790 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,124 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 83,128 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,164 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,229 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,677 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,226 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,368 |
| Random American Countries on a Map | 0 | - | 4.96 | 98,568 |
| Rivers of the United States | 0 | - | 4.93 | 65,450 |
| Countries Closest to United States A-Z | 0 | - | 4.81 | 117,354 |
| American Founding Fathers | 0 | - | 4.41 | 23,065 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,241 |
| History of Florida | 0 | - | 4.45 | 9,759 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,052 |
| Hawaiian Islands | 0 | - | 4.83 | 42,415 |
| Countries Closest to Maine | 0 | - | 4.84 | 66,394 |
| History of Texas | 0 | - | 4.43 | 14,547 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,070 |
| American History Quotes #1 | 0 | - | 4.37 | 95,669 |
| People on Money - United States | 0 | - | 4.31 | 63,199 |
| American History Quotes #2 | 0 | - | 4.38 | 41,220 |
| Old West History | 0 | - | 4.33 | 15,219 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,224 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,707 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,488 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,843 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,636 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,067 |
| Fifty US States in One Minute | 0 | - | 4.56 | 3,516,973 |
| U.S. State Flags | 0 | - | 4.89 | 166,850 |
| U.S. States that Border Canada | 0 | - | 4.91 | 182,262 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 206,527 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 218,180 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,349 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 48,503 |
| Cartoon Versions of U.S. States | 0 | - | 4.77 | 63,505 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 123,808 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,587 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 90,972 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,520 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,613 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,399 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 87,972 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,482 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,381 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,277 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,330 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 491,272 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,728 |
| The Vietnam War | 0 | - | 4.43 | 35,283 |
| U.S. States Closest to Tokyo | 0 | - | 4.89 | 59,360 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,905 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 126,679 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 216,466 |
| U.S. State Nicknames Quiz | 0 | - | 4.47 | 50,245 |
