| U.S. Presidents by Picture | 0 | - | 4.87 | 428,197 |
| Play-Doh Presidents | 0 | - | 5.00 | 82,798 |
| Name a Valid U.S. President #1 | 0 | - | 4.90 | 193,565 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,721,781 |
| First Names of U.S. Presidents | 0 | - | 4.86 | 383,358 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,904 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 23,324 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 48,064 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 306,058 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 70,516 |
| U.S. Presidents by Picture - Multiple Choice | 0 | - | 4.50 | 29,007 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,262 |
| U.S. President Scramble | 0 | - | 4.40 | 117,392 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.42 | 24,052 |
| Presidential Actors | 0 | - | 4.36 | 19,239 |
| The Barack Obama Presidency | 0 | - | 4.13 | 25,490 |
| Random U.S. States on a Map | 0 | - | 4.96 | 629,671 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,596 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 109,278 |
| U.S. Presidents by Event | 0 | - | 4.58 | 35,213 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.62 | 94,545 |
| Presidential Middle Names | 0 | - | 4.41 | 60,666 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,208 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 53,604 |
| Assassinated U.S. Presidents | 0 | - | 4.63 | 94,863 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 35,175 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,604 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,371 |
| Random U.S. Presidents by Picture | 0 | - | 4.40 | 66,547 |
| U.S. Vice Presidents | 0 | - | 4.39 | 136,883 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,352 |
| U.S. Presidential Running Mates | 0 | - | 4.41 | 28,748 |
| First Ladies of the United States | 0 | - | 4.28 | 85,912 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,298 |
| U.S. Presidents in Order by First Letter | 0 | - | 4.32 | 77,433 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,900 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 16,342 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,232 |
| Add a Letter - Make a U.S. President | 0 | - | 4.58 | 24,079 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,790 |
| Win the 1828 U.S. Presidential Election | 0 | - | 4.30 | 56,632 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,931 |
| The Bill Clinton Presidency | 0 | - | 4.24 | 31,521 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,544 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,878 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 22,084 |
| The American Revolution | 0 | - | 4.52 | 54,341 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 191,654 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 129,582 |
| Vietnam War Countries | 0 | - | 4.82 | 94,547 |
| U.S. Senators by State | 0 | - | 4.44 | 40,089 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 235,127 |
| United States Map Quiz | 0 | - | 4.98 | 4,169,289 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 20,141 |
| The George Washington Presidency | 0 | - | 4.03 | 14,596 |
| The Thomas Jefferson Presidency | 0 | - | 4.26 | 13,769 |
| Random U.S. Vice President to President | 0 | - | 4.39 | 30,742 |
| The John Adams Presidency | 0 | - | 4.12 | 8,778 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,977 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,772 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,751 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,915 |
| The Kennedy Family | 0 | - | 3.90 | 14,093 |
| Colonies of the Americas in 1775 with a Map | 0 | - | 4.88 | 19,910 |
| Vatican City Country Quiz | 0 | - | 4.53 | 44,624 |
| The Iraq War | 0 | - | 4.47 | 15,699 |
| Third Most Common Language by U.S. State | 0 | - | 4.87 | 113,944 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 70,203 |
| Countries of the Soviet Union | 0 | - | 4.98 | 195,463 |
| Soviet Union Country Quiz | 0 | - | 4.91 | 81,084 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,296 |
| U.S. State Border Crossings | 0 | - | 4.97 | 96,819 |
| Name the U.S. National Parks | 0 | - | 4.86 | 60,405 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 240,701 |
| Total United States Immigration by Country | 0 | - | 4.91 | 112,259 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 75,866 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,399 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 246,070 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 73,064 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 194,323 |
| Cities and Towns of Massachusetts | 0 | - | 4.93 | 74,888 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.85 | 66,651 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 40,210 |
| US States Quiz | 0 | - | 5.00 | 16,976,501 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 368,445 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 151,193 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 85,034 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 65,622 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 71,716 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 57,471 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 116,707 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 118,595 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 107,408 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 39,357 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 334,929 |
| Pixelated United States Map | 0 | - | 4.88 | 94,733 |
| Most-Visited Countries by Americans | 0 | - | 4.86 | 110,402 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 92,343 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 147,078 |
| Countries that Beat the United States | 0 | - | 4.93 | 168,482 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 29,135 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.50 | 11,854 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,640 |
| California A-Z | 0 | - | 4.49 | 28,838 |
| Six Flags Over Texas | 0 | - | 4.78 | 63,573 |
| U.S. History for Dummies | 0 | - | 4.47 | 83,363 |
| The Most Recent... United States | 0 | - | 4.46 | 18,557 |
| The American Civil War | 0 | - | 4.62 | 52,607 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,333 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 118,939 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 509,554 |
| U.S. States with the Letter Y | 0 | - | 4.86 | 112,156 |
| 10 Southernmost U.S. States | 0 | - | 4.89 | 114,171 |
| U.S. States with Short Names | 0 | - | 4.91 | 150,216 |
| U.S. States that Start with M | 0 | - | 4.93 | 188,210 |
| U.S. States By Population | 0 | - | 4.92 | 154,061 |
| U.S. States that Start with N | 0 | - | 4.95 | 172,116 |
| U.S. States with Longest Names | 0 | - | 4.85 | 44,823 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 49,185 |
| US States with an Empty Map | 0 | - | 5.00 | 627,998 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 82,994 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 88,789 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 64,492 |
| Draw All US State Borders | 0 | - | 4.99 | 140,289 |
| The Only Remaining U.S. State . . . | 0 | - | 4.93 | 66,018 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 160,591 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 178,132 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 125,613 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,791 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 86,602 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 102,361 |
| U.S. States with the Most Immigrants | 0 | - | 4.85 | 82,971 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.85 | 67,941 |
| Draw All US State Borders - Extreme | 0 | - | 4.99 | 79,164 |
| U.S. States or European Countries by Area | 0 | - | 4.95 | 96,902 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 134,029 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 166,346 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 104,546 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 54,586 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 61,569 |
| Countries of Iberia in History with a Map | 0 | - | 4.88 | 42,318 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 86,792 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 99,001 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 238,145 |
| Most-Visited Countries by Popes | 0 | - | 4.56 | 84,106 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 70,434 |
| The Persian Gulf War | 0 | - | 4.02 | 8,478 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,991 |
| Countries Bordering China Since 1914 | 0 | - | 4.92 | 95,787 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.81 | 55,130 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 89,852 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 81,644 |
| Most Guessed North American Teams by Sport | 0 | - | 4.28 | 65,002 |
| Rivers of the United States | 0 | - | 4.93 | 66,591 |
| Names of Generations | 0 | - | 4.09 | 45,445 |
| Countries Closest to United States A-Z | 0 | - | 4.82 | 118,617 |
| American Founding Fathers | 0 | - | 4.42 | 23,269 |
| Countries Closest to Alaska | 0 | - | 4.93 | 125,008 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 47,159 |
| History of Florida | 0 | - | 4.45 | 9,868 |
| Hawaiian Islands | 0 | - | 4.83 | 42,904 |
| Countries Closest to Maine | 0 | - | 4.85 | 67,519 |
| History of Texas | 0 | - | 4.43 | 14,680 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,477 |
| American History Quotes #1 | 0 | - | 4.37 | 96,180 |
| People on Money - United States | 0 | - | 4.31 | 63,423 |
| American History Quotes #2 | 0 | - | 4.38 | 41,493 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,574 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 45,189 |
| Events in U.S. History | 0 | - | 4.41 | 28,797 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 33,183 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,772 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,326 |
| U.S. State Flags | 0 | - | 4.89 | 172,494 |
| U.S. States that Border Canada | 0 | - | 4.91 | 186,406 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 210,352 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 50,020 |
| Cartoon Versions of U.S. States | 0 | - | 4.75 | 64,120 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 125,765 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 126,374 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 92,725 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.83 | 62,167 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 58,393 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 162,183 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 58,443 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 102,251 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 494,526 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 83,302 |
| Random American Countries on a Map | 0 | - | 4.96 | 100,104 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 222,120 |
| Territories of the United States | 0 | - | 4.80 | 52,591 |
| Five Biggest Immigrant Groups by Decade in the US | 0 | - | 4.79 | 39,846 |
| Most Mentioned Enemies of the USA | 0 | - | 4.77 | 176,018 |
| U.S. Five-Star Generals and Admirals | 0 | - | 4.33 | 8,357 |
| Major non-NATO U.S. Allies | 0 | - | 4.52 | 52,477 |
| Name a Valid Answer - United States #1 | 0 | - | 4.62 | 94,339 |
| U.S. Highway Signs By State | 0 | - | 4.46 | 15,564 |
| Most Common High School Mascots | 0 | - | 4.47 | 32,282 |
| Three Real and One Fake - U.S. History | 0 | - | 4.33 | 25,833 |
| Golden State Warriors Trivia | 0 | - | 4.25 | 25,039 |
