What Was the Hindenburg?(By: Kevin McVeigh,David Groff,Janet B. Pascal)
2013
What Was the Battle of Gettysburg?(By: John Mantha,Jim O'Connor,James Bennett)
2013
What Was the Gold Rush?(With: Tim Tomkinson)
2013
What Was the March on Washington?(By: Tim Tomkinson,Kathleen Krull)
2013
What Was the Boston Tea Party?(By: Lauren Mortimer,Kathleen Krull)
2013
What Was Pearl Harbor?(By: John Mantha,Patricia Brennan Demuth)
2013
What Was the Alamo?(By: Meg Belviso,David Groff,Pam Pollack)
2013
What Was the Underground Railroad?(By: Yona Zeldis McDonough,Lauren Mortimer)
2013
What Was Pompeii?(By: John Hinderliter,Jim O'Connor,Who Hq)
2014
What Was Ellis Island?(By: David Groff,Patricia Brennan Demuth)
2014
What Is the Statue of Liberty?(With: John Hinderliter)
2014
What Is the Panama Canal?(By: Janet B. Pascal)
2014
What Was the Lewis and Clark Expedition?(By: Megan Stine,Who HQ)
2014
What Was D-Day?(By: Patricia Brennan Demuth,David Grayson Kenyon)
2015
What Is the World Series?(By: Gail Herman)
2015
What Was Hurricane Katrina?(By: John Hinderliter,Robin Koontz)
2015
What Were the Salem Witch Trials?(With: Dede Putra)
2015
What Is the Super Bowl?(By: David Groff,Dina Anastasio)
2015
What Was the Great Depression?(By: Dede Putra,Janet B. Pascal)
2015
What Was Woodstock?
2016
What Are the Summer Olympics?(By: Gail Herman)
2016
What Is the Declaration of Independence?(By: Jerry Hoare,Michael C. Harris)
2016
What Were the Twin Towers?(By: Ted Hammond,Jim O'Connor)
2016
What Was the Great Chicago Fire?(By: Janet B. Pascal)
2016
What Was the San Francisco Earthquake?(By: Dorothy Hoobler,Thomas Hoobler)
2016
What Was the Age of the Dinosaurs?(By: Megan Stine,Gregory Copeland)
2017
What Was the Wild West?(By: Stephen Marchesi,Janet B. Pascal)
2017
What Is Rock and Roll?(By: Gregory Copeland,Jim O'Connor)
2017
What Was the Ice Age?(By: Nico Medina,David Groff)
2017
What Are the Ten Commandments?(By: Yona Zeldis McDonough)
2017
What Is the World Cup?(By: Stephen Marchesi,Bonnie Bader)
2018
What Was the Titanic?(By: Gregory Copeland,Stephanie Sabol)
2018
What Was the Holocaust?(By: Jerry Hoare,Gail Herman)
2018
What Is Climate Change?(By: John Hinderliter,Gail Herman)
2018
What Is the Constitution?(By: Patricia Brennan Demuth)
2018
What Is the Women's Rights Movement?(By: Deborah Hopkinson)
2018
What Were the Roaring Twenties?(By: Jake Murray,Michele Mortlock)
2018
What Is the Stanley Cup?(By: Gregory Copeland,Gail Herman)
2019
What Was Stonewall?(By: Nico Medina,Jake Murray)
2019
What Is NASA?(By: Ted Hammond,Sarah Fabiny)
2019
What Was the Vietnam War?(By: Jim O'Connor)
2019
What Was the Berlin Wall?(By: Nico Medina,Stephen Marchesi)
2019
What Were the Negro Leagues?(By: Stephen Marchesi,Varian Johnson)
2019
What Are the Paralympic Games?(By: Andrew Thomson,Gail Herman)
2020
What Was the Bombing of Hiroshima?(By: Jess Brallier)
2020
What Is LEGO?(By: Ted Hammond,Jim O'Connor,Who Hq)
2020
What Is a Presidential Election?(By: Douglas Yacka)
2020
What Is the Civil Rights Movement?(By: Sherri L. Smith)
2020
What Is Nintendo?(By: Andrew Thomson,Gina Shaw)
2021
What Was the Age of Exploration?(By: Catherine R. Daly,Jake Murray)
2021
What Is Congress?(By: David Malan,Jill Abramson)
2021
What Is Black Lives Matter?(By: Lakita Wilson)
2021
What Are the Winter Olympics?(By: Jake Murray,Gail Herman)
2021
What Was the Plague?(By: Dede Putra,Roberta Edwards,Who Hq)
2021
What Was the Harlem Renaissance?(By: Sherri L. Smith)
2021
What Are Castles and Knights?(By: Dede Putra,Sarah Fabiny)
2022
What Is Juneteenth?(By: Kirsti Jewel)
2022
What Is the AIDS Crisis?(By: Nico Medina)
2022
What Is the Supreme Court?(By: Gregory Copeland,Jill Abramson,Who Hq)
2022
What Was Reconstruction?(By: Sherri L. Smith)
2022
What Is the Women's World Cup?(By: Ted Hammond,Gina Shaw)
2023
What Was the Tulsa Race Massacre of 1921?(By: Caleb Gayle)
2023
What Was World War I?(By: Nico Medina,Dede Putra)
2023
What Was the Donner Party?(By: Ben Hubbard)
2023
What Was the Children's Blizzard of 1888?(By: Dede Putra,Steve Korté)
2023