| U.S. Presidents by Picture | 0 | - | 4.87 | 423,293 |
| Play-Doh Presidents | 0 | - | 5.00 | 81,600 |
| Name a Valid U.S. President #1 | 0 | - | 4.89 | 189,617 |
| U.S. Presidents Quiz | 0 | - | 5.00 | 3,649,082 |
| First Names of U.S. Presidents | 0 | - | 4.85 | 379,360 |
| The John F. Kennedy Presidency | 0 | - | 4.47 | 43,448 |
| U.S. Presidents With Facial Hair By Picture | 0 | - | 4.48 | 22,997 |
| People in Pictures with Barack Obama | 0 | - | 4.10 | 47,672 |
| US Presidents - One Minute Sprint | 0 | - | 4.41 | 303,184 |
| Name a Valid U.S. President #2 | 0 | - | 4.54 | 69,320 |
| The George W. Bush Presidency | 0 | - | 4.06 | 32,078 |
| U.S. President Scramble | 0 | - | 4.40 | 116,144 |
| The Franklin D. Roosevelt Presidency | 0 | - | 4.43 | 23,807 |
| Presidential Actors | 0 | - | 4.36 | 19,049 |
| The Barack Obama Presidency | 0 | - | 4.16 | 25,241 |
| Random U.S. States on a Map | 0 | - | 4.96 | 620,829 |
| U.S. Vice Presidents | 0 | - | 4.41 | 134,746 |
| U.S. Presidential Quotes | 0 | - | 4.37 | 44,350 |
| U.S. Presidential Trivia #1 | 0 | - | 4.45 | 107,850 |
| U.S. Presidents by Event | 0 | - | 4.58 | 33,364 |
| Losing U.S. Presidential Candidates in History | 0 | - | 4.61 | 92,915 |
| Presidential Middle Names | 0 | - | 4.41 | 59,639 |
| The Jimmy Carter Presidency | 0 | - | 4.41 | 19,021 |
| U.S. Presidential Trivia #2 | 0 | - | 4.49 | 52,670 |
| Assassinated U.S. Presidents | 0 | - | 4.61 | 93,746 |
| Ten Least Guessed U.S. Presidents | 0 | - | 4.45 | 38,144 |
| George Bush... or George Bush | 0 | - | 3.98 | 8,176 |
| U.S. Presidents Who Died in Office | 0 | - | 4.77 | 34,707 |
| Random U.S. Presidents by Picture | 0 | - | 4.39 | 65,766 |
| People in Pictures with Ronald Reagan | 0 | - | 4.35 | 40,426 |
| U.S. Presidents to Win the Nobel Peace Prize | 0 | - | 4.34 | 18,197 |
| U.S. Governors Who Ran For President | 0 | - | 4.47 | 20,155 |
| First Ladies of the United States | 0 | - | 4.28 | 85,198 |
| The Bill Clinton Presidency | 0 | - | 4.22 | 31,341 |
| The George H. W. Bush Presidency | 0 | - | 4.36 | 21,407 |
| The Ronald Reagan Presidency | 0 | - | 4.26 | 24,710 |
| The Richard Nixon Presidency | 0 | - | 4.05 | 21,915 |
| The Abraham Lincoln Presidency | 0 | - | 4.52 | 26,100 |
| U.S. Presidents in Order - Whammies | 0 | - | 4.32 | 76,183 |
| U.S. Vice Presidents Who Became President | 0 | - | 4.64 | 15,984 |
| Add a Letter - Make a U.S. President | 0 | - | 4.61 | 23,817 |
| U.S. Presidential Last Names as Baby Names | 0 | - | 4.19 | 33,333 |
| Deadliest U.S. Wars | 0 | - | 4.89 | 189,133 |
| Confederate States of the U.S. Civil War | 0 | - | 4.91 | 128,620 |
| Shortest U.S. Presidential Terms | 0 | - | 4.75 | 12,673 |
| Vietnam War Countries | 0 | - | 4.83 | 93,537 |
| U.S. Senators by State | 0 | - | 4.44 | 39,722 |
| The American Revolution | 0 | - | 4.52 | 54,035 |
| Random Sequential U.S. States on a Map | 0 | - | 4.99 | 233,046 |
| United States Map Quiz | 0 | - | 4.98 | 4,139,814 |
| U.S. Presidential Running Mates | 0 | - | 4.40 | 28,448 |
| US Presidents Breakdown Puzzle #1 | 0 | - | 3.69 | 19,955 |
| 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 | 30,429 |
| The John Adams Presidency | 0 | - | 4.12 | 8,673 |
| Franklin... or Theodore Roosevelt | 0 | - | 4.35 | 16,861 |
| The Theodore Roosevelt Presidency | 0 | - | 4.39 | 7,678 |
| U.S. Presidential Knowledge - Multiple Choice | 0 | - | 4.36 | 21,602 |
| U.S. Vice Presidential Trivia | 0 | - | 4.26 | 12,764 |
| The Kennedy Family | 0 | - | 3.90 | 14,021 |
| Colonies of the Americas in 1775 with a Map | 0 | - | 4.88 | 19,172 |
| Vatican City Country Quiz | 0 | - | 4.53 | 43,961 |
| The Iraq War | 0 | - | 4.47 | 15,539 |
| Third Most Common Language by U.S. State | 0 | - | 4.89 | 113,344 |
| Countries of Europe in 1650 with a Map | 0 | - | 4.95 | 67,186 |
| Countries of the Soviet Union | 0 | - | 4.98 | 193,702 |
| Soviet Union Country Quiz | 0 | - | 4.90 | 80,186 |
| George Washington... or George W. Bush? | 0 | - | 4.16 | 12,202 |
| Countries of the Mongol Empire on a Map | 0 | - | 4.99 | 105,722 |
| U.S. State Border Crossings | 0 | - | 4.97 | 95,856 |
| Name the U.S. National Parks | 0 | - | 4.85 | 57,815 |
| U.S. Citizenship Test Questions | 0 | - | 4.83 | 238,177 |
| Total United States Immigration by Country | 0 | - | 4.91 | 110,538 |
| U.S. Cities with the Most International Tourists | 0 | - | 4.88 | 74,763 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,034 |
| "Do Not Travel" Countries for U.S. Citizens | 0 | - | 4.97 | 240,008 |
| All 3,143 Counties of the United States on a Map | 0 | - | 4.97 | 327,566 |
| All U.S. Supreme Court Justices | 0 | - | 4.54 | 28,869 |
| U.S. Cabinet Departments | 0 | - | 4.86 | 72,481 |
| All U.S. Supreme Court Justices Ever | 0 | - | 4.49 | 11,663 |
| Most-Visited Countries by U.S. Presidents | 0 | - | 4.96 | 192,411 |
| Cities and Towns of Massachusetts | 0 | - | 4.92 | 72,972 |
| Top 10 Non-English Languages Spoken in New York City | 0 | - | 4.84 | 65,541 |
| Countries Larger Than Texas but With Fewer People | 0 | - | 4.92 | 39,440 |
| U.S. Civil War Decoder | 0 | - | 4.14 | 25,172 |
| US States Quiz | 0 | - | 5.00 | 16,680,961 |
| States of the U.S. in Alphabetical Order | 0 | - | 4.98 | 365,072 |
| Countries of Europe in 1815 With a Map | 0 | - | 4.99 | 148,789 |
| Countries of Europe in 1848 | 0 | - | 4.98 | 75,304 |
| Countries of Europe in 1870 with a Map | 0 | - | 4.95 | 63,253 |
| Every Country of Europe Since 1815 With a Map | 0 | - | 4.98 | 69,996 |
| Countries of Europe in 1360 with a Map | 0 | - | 4.99 | 55,917 |
| Biggest Spanish Empire Countries | 0 | - | 4.91 | 114,677 |
| Modern-Day Countries of the British Empire in 1921 | 0 | - | 4.99 | 116,118 |
| The Persian Gulf War | 0 | - | 4.02 | 8,397 |
| Biggest Mongol Empire Countries | 0 | - | 4.89 | 80,608 |
| Most Guessed North American Teams by Sport | 0 | - | 4.28 | 63,701 |
| 10 Longest Rivers in the United States | 0 | - | 4.85 | 38,770 |
| Pixelated United States Map | 0 | - | 4.89 | 93,328 |
| Most-Visited Countries by Americans | 0 | - | 4.87 | 108,303 |
| Countries that Visit the United States the Most | 0 | - | 4.96 | 90,729 |
| Countries Closest to United States by Continent | 0 | - | 4.99 | 145,286 |
| Countries that Beat the United States | 0 | - | 4.93 | 165,397 |
| U.S. Presidents True or False | 0 | - | 3.96 | 15,524 |
| California A-Z | 0 | - | 4.49 | 28,698 |
| Top 10 Los Angeles Lakers of All-Time | 0 | - | 4.24 | 46,444 |
| Six Flags Over Texas | 0 | - | 4.79 | 62,977 |
| Embarrassing Chapters in US History | 0 | - | 4.17 | 32,978 |
| U.S. History for Dummies | 0 | - | 4.47 | 82,410 |
| The Most Recent... United States | 0 | - | 4.45 | 18,264 |
| The American Civil War | 0 | - | 4.62 | 52,099 |
| The 13 Colonies Quiz | 0 | - | 4.97 | 116,598 |
| Word Scramble - U.S. States | 0 | - | 4.95 | 501,262 |
| U.S. States with the Letter Y | 0 | - | 4.85 | 110,224 |
| 10 Southernmost U.S. States | 0 | - | 4.88 | 112,289 |
| U.S. States with Short Names | 0 | - | 4.91 | 147,498 |
| U.S. States that Start with M | 0 | - | 4.93 | 185,771 |
| U.S. States By Population | 0 | - | 4.92 | 152,259 |
| U.S. States that Start with N | 0 | - | 4.95 | 170,262 |
| U.S. States with Longest Names | 0 | - | 4.84 | 43,781 |
| Louisiana Purchase with a Map | 0 | - | 4.96 | 47,467 |
| US States with an Empty Map | 0 | - | 5.00 | 618,183 |
| 10 Northernmost U.S. States | 0 | - | 4.90 | 81,841 |
| U.S. States with a Unique First Letter | 0 | - | 4.96 | 87,455 |
| 10 Westernmost U.S. States | 0 | - | 4.95 | 63,712 |
| Draw All US State Borders | 0 | - | 4.99 | 133,191 |
| The Only Remaining U.S. State . . . | 0 | - | 4.92 | 64,789 |
| Top 10 Largest U.S. States by Area | 0 | - | 4.95 | 158,779 |
| Top 10 Smallest U.S. States by Area | 0 | - | 4.98 | 177,032 |
| Top 10 Poorest U.S. States by Median Income | 0 | - | 4.86 | 124,401 |
| U.S. States with the Highest Percentage of Hispanics | 0 | - | 4.85 | 69,028 |
| Top 10 Newest U.S. States | 0 | - | 4.85 | 85,616 |
| Top 10 Most-Visited U.S. States | 0 | - | 4.90 | 100,978 |
| U.S. States with the Most Immigrants | 0 | - | 4.84 | 81,875 |
| Top 10 U.S. States Where the Rent is Too Dang High | 0 | - | 4.84 | 66,748 |
| U.S. States or European Countries by Area | 0 | - | 4.94 | 94,556 |
| U.S. States or European Countries by Population | 0 | - | 4.97 | 131,801 |
| Countries that Bordered the USSR | 0 | - | 4.93 | 164,371 |
| Modern Day Countries of Austria-Hungary on a Map | 0 | - | 4.98 | 102,415 |
| All Modern-Day Countries Ever Controlled by Greeks | 0 | - | 4.98 | 53,384 |
| Modern Day Countries of the Dutch Empire on a Map | 0 | - | 4.87 | 60,293 |
| Countries of Iberia in History with a Map | 0 | - | 4.87 | 41,072 |
| Modern Day Countries of the Spanish Empire on a Map | 0 | - | 4.95 | 85,411 |
| The United States... or the United Kingdom? | 0 | - | 4.87 | 97,758 |
| Commonwealth of Nations Countries | 0 | - | 4.94 | 236,092 |
| Most-Visited Countries by Popes | 0 | - | 4.55 | 83,097 |
| Modern-Day Countries of the Persian Empire on a Map | 0 | - | 4.98 | 69,140 |
| Countries in the Ottoman Empire | 0 | - | 4.89 | 72,204 |
| Countries Bordering China Since 1914 | 0 | - | 4.93 | 94,634 |
| All Modern-Day Countries Ever Controlled by Chinese People | 0 | - | 4.82 | 54,192 |
| Modern Day Countries of the Japanese Empire on a Map | 0 | - | 4.98 | 88,332 |
| Random American Countries on a Map | 0 | - | 4.96 | 98,535 |
| Rivers of the United States | 0 | - | 4.93 | 65,431 |
| Countries Closest to United States A-Z | 0 | - | 4.81 | 117,321 |
| American Founding Fathers | 0 | - | 4.41 | 23,063 |
| Countries Closest to Alaska | 0 | - | 4.93 | 123,208 |
| History of Florida | 0 | - | 4.45 | 9,757 |
| The Life of Martin Luther King Jr. | 0 | - | 4.73 | 11,051 |
| Hawaiian Islands | 0 | - | 4.83 | 42,406 |
| Countries Closest to Maine | 0 | - | 4.84 | 66,374 |
| History of Texas | 0 | - | 4.43 | 14,547 |
| U.S. States that Border Tennessee | 0 | - | 4.83 | 65,063 |
| American History Quotes #1 | 0 | - | 4.37 | 95,657 |
| People on Money - United States | 0 | - | 4.31 | 63,196 |
| American History Quotes #2 | 0 | - | 4.38 | 41,214 |
| Old West History | 0 | - | 4.32 | 15,216 |
| U.S. History Groups of Two | 0 | - | 4.23 | 44,219 |
| 100 Most Influential Figures in U.S. History | 0 | - | 4.20 | 44,700 |
| Life of Benjamin Franklin | 0 | - | 4.24 | 6,486 |
| American Revolution - Multiple Choice | 0 | - | 4.34 | 19,840 |
| U.S. History Multiple Choice #3 | 0 | - | 4.43 | 24,634 |
| Last Names in U.S. History #1 | 0 | - | 4.25 | 36,062 |
| Fifty US States in One Minute | 0 | - | 4.56 | 3,516,404 |
| U.S. State Flags | 0 | - | 4.89 | 166,725 |
| U.S. States that Border Canada | 0 | - | 4.91 | 182,017 |
| Name a Valid U.S. State #1 | 0 | - | 4.93 | 206,459 |
| Category Elimination - U.S. States #1 | 0 | - | 4.87 | 218,017 |
| Category Elimination - U.S. States #2 | 0 | - | 4.82 | 132,293 |
| Great Plains States and Provinces on a Map | 0 | - | 4.95 | 48,470 |
| Cartoon Versions of U.S. States | 0 | - | 4.77 | 63,491 |
| Top 10 Coldest U.S. States | 0 | - | 4.94 | 123,787 |
| Top 10 Hottest U.S. States | 0 | - | 4.86 | 124,564 |
| Top 10 Most Native American U.S. States | 0 | - | 4.87 | 90,947 |
| Top 10 U.S. States with the Least Precipitation | 0 | - | 4.82 | 61,512 |
| U.S. States that Start with M - Shape Quiz | 0 | - | 4.94 | 57,599 |
| Neutral European Countries of WWII | 0 | - | 4.91 | 160,366 |
| U.S. States or European Countries by GDP | 0 | - | 4.98 | 87,932 |
| All Modern-Day Countries Ever Controlled by French People | 0 | - | 4.99 | 57,460 |
| States of the Holy Roman Empire in 1356 | 0 | - | 4.97 | 72,347 |
| Modern Countries Conquered by Alexander the Great | 0 | - | 4.90 | 105,268 |
| Biggest Roman Empire Countries | 0 | - | 4.87 | 101,309 |
| Ultimate Harry Potter Name Game | 0 | - | 4.94 | 491,188 |
| Modern-Day Countries of the Ottoman Empire on a Map | 0 | - | 4.96 | 81,689 |
| The Vietnam War | 0 | - | 4.43 | 35,277 |
| U.S. States Closest to Tokyo | 0 | - | 4.89 | 59,324 |
| Colonies of Africa with a Map | 0 | - | 4.77 | 53,893 |
| Random Sequential African Countries on a Map | 0 | - | 5.00 | 126,646 |
| Most-Spoken Languages of the United States | 0 | - | 4.52 | 216,324 |
| U.S. State Nicknames Quiz | 0 | - | 4.47 | 50,233 |
