| U.S. Presidents by Picture | 0 | - | 4.87 | 429,027 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 384,029 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,996 |
| Random U.S. States on a Map | 0 | - | 4.96 | 631,602 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,733,517 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,976 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,769 |
| Pixelated United States Map | 0 | - | 4.89 | 95,051 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,913 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,488 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.97 | 195,029 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 192,104 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 235,537 |
| U.S. Map with Random Merged States | 0 | - | 4.94 | 304,373 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,301 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,563 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,568 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,252 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,967 |
| United States Map Quiz | 0 | - | 4.98 | 4,174,469 |
| U.S. President Scramble | 0 | - | 4.40 | 117,600 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 194,140 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,375 |
| U.S. State Border Crossings | 0 | - | 4.97 | 97,001 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 241,048 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 114,054 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 76,118 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,629 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,113 |
| The Barack Obama Presidency | 0 | - | 4.14 | 25,536 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 75,332 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,358 |
| US States Quiz | 0 | - | 5.00 | 17,034,289 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,994 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,863 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,665 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 86,292 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 66,117 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.97 | 72,096 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,798 |
| Flags of Countries of the World in 1910 | 0 | - | 4.96 | 79,655 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,640 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,629 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 176,031 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 247,278 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 336,595 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,834 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,669 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,201 |
| Presidential Actors | 0 | - | 4.36 | 19,270 |
| American Revolution Decoder | 0 | - | 4.12 | 21,006 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,865 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,695 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,538 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 119,257 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,504 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,509 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,602 |
| U.S. States that Start with M | 0 | - | 4.94 | 188,669 |
| U.S. States By Population | 0 | - | 4.92 | 154,318 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,450 |
| U.S. States with Longest Names | 0 | - | 4.85 | 45,021 |
| US States with an Empty Map | 0 | - | 5.00 | 629,947 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 83,203 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 89,027 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,622 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,260 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 161,226 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,346 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,804 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,894 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,748 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 68,096 |
| Every European Country Shape | 0 | - | 4.96 | 203,374 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,863 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 117,196 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,576 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 87,083 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 119,145 |
| Every Asian Country Shape | 0 | - | 4.95 | 88,785 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 73,146 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.81 | 55,336 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,769 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,867 |
| Every African Country Shape | 0 | - | 4.90 | 88,720 |
| South America Flags Map Quiz | 0 | - | 4.95 | 89,267 |
| 10 Longest Rivers in the United States | 0 | - | 4.86 | 39,484 |
| Rivers of the United States | 0 | - | 4.93 | 66,842 |
| Names of Generations | 0 | - | 4.09 | 45,633 |
| U.S. Cities by Picture #1 | 0 | - | 4.36 | 34,772 |
| Cities by Picture #2 | 0 | - | 4.19 | 35,344 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,880 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,474 |
| Countries that Beat the United States | 0 | - | 4.93 | 169,025 |
| Topological Map of the USA Quiz | 0 | - | 4.49 | 29,345 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,713 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,524 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,803 |
| Presidential Middle Names | 0 | - | 4.42 | 60,845 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,769 |
| Assassinated U.S. Presidents | 0 | - | 4.62 | 94,961 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,270 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,672 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,243 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,699 |
| American Founding Fathers | 0 | - | 4.42 | 23,311 |
| The American Revolution | 0 | - | 4.52 | 54,404 |
| Countries Closest to Alaska | 0 | - | 4.93 | 125,397 |
| Stephen Curry Quiz | 0 | - | 4.37 | 67,459 |
| History of Florida | 0 | - | 4.45 | 9,892 |
| Hawaiian Islands | 0 | - | 4.83 | 43,046 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,751 |
| History of Texas | 0 | - | 4.43 | 14,707 |
| LeBron James Trivia | 0 | - | 4.02 | 171,924 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,597 |
| American History Quotes #1 | 0 | - | 4.37 | 96,269 |
| People on Money - United States | 0 | - | 4.31 | 63,519 |
| American History Quotes #2 | 0 | - | 4.38 | 41,547 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,643 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.09 | 54,552 |
| Events in U.S. History | 0 | - | 4.41 | 28,870 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,227 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,814 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,379 |
| The American Civil War | 0 | - | 4.62 | 52,684 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 511,334 |
| U.S. State Flags | 0 | - | 4.88 | 173,713 |
| U.S. States that Border Canada | 0 | - | 4.91 | 187,204 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,504 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,994 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 50,347 |
| Draw All US State Borders | 0 | - | 4.99 | 141,756 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 126,118 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,774 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 93,061 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,630 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 83,145 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,311 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,578 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 97,487 |
| Neutral European Countries of WWII | 0 | - | 4.92 | 162,622 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,704 |
| Europe Map with Random Merged Countries | 0 | - | 4.97 | 321,034 |
| Random European Flag to Country | 0 | - | 4.90 | 184,586 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,700 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 105,075 |
| Flags of Countries That Border France | 0 | - | 4.89 | 123,984 |
| Flags of Countries that Border Germany | 0 | - | 4.86 | 98,029 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,474 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 99,237 |
| Commonwealth of Nations Countries | 0 | - | 4.95 | 238,688 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,698 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,618 |
| The Vietnam War | 0 | - | 4.44 | 35,700 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 95,979 |
| Flags of Countries that Border China | 0 | - | 4.94 | 100,283 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 90,169 |
| Africa Flags Map Quiz | 0 | - | 4.94 | 36,977 |
| Random African Flag to Country | 0 | - | 4.87 | 75,786 |
| Eastern Africa Map Quiz | 0 | - | 4.98 | 79,746 |
| Former Country Flag-Shape Picture Quiz | 0 | - | 4.98 | 90,385 |
| Random American Countries on a Map | 0 | - | 4.96 | 100,586 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 223,343 |
| Territories of the United States | 0 | - | 4.80 | 52,692 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,949 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 176,314 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,365 |
| U.S. States by Picture #1 | 0 | - | 4.21 | 15,529 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,619 |
| Name a Valid Answer - United States #1 | 0 | - | 4.61 | 94,528 |
| Most Common High School Mascots | 0 | - | 4.47 | 32,377 |
| Three Real and One Fake - U.S. History | 0 | - | 4.33 | 25,864 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,179 |
| U.S. Political Figures by Picture #1 | 0 | - | 4.14 | 26,231 |
| U.S. Political Figures by Picture #2 | 0 | - | 4.10 | 15,580 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,884 |
| Female Political Figures by Picture - U.S. | 0 | - | 4.22 | 10,916 |
| U.S. Vice Presidents | 0 | - | 4.39 | 137,246 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,389 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,810 |
| First Ladies of the United States | 0 | - | 4.28 | 86,046 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,343 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,551 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,157 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,393 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,132 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.32 | 59,751 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,153 |
| New York City Geography | 0 | - | 4.43 | 33,210 |
| LeBron... or Kobe? | 0 | - | 4.05 | 70,620 |
| Cleveland Browns QBs Since 1999 | 0 | - | 4.31 | 7,880 |
| History of Pennsylvania | 0 | - | 4.16 | 7,179 |
| History of Virginia | 0 | - | 4.33 | 11,651 |
| Washington D.C. by Picture | 0 | - | 4.49 | 26,890 |
| Old West History | 0 | - | 4.34 | 15,311 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,540 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 20,001 |
| U.S. History Multiple Choice #2 | 0 | - | 4.33 | 25,146 |
| U.S. History Multiple Choice #1 | 0 | - | 4.29 | 22,315 |
| Valid Answer - U.S. History | 0 | - | 4.24 | 22,626 |
