CK-12 Foundation
Whole Number Division: Repaying Money
Mathematicians answer five word problems in an interactive practice all about repaying money using division. A calendar and moveable dollar bills aides participants in finding solutions to multiple-choice, fill-in-the-blank, and...
CK-12 Foundation
Estimation of Whole Number Multiplication and Division: Lettuce Garden
Estimating whole number multiplication and division is the focus of an interactive that uses a garden plot with moveable points to answer six questions.
CK-12 Foundation
Addition and Multiplication Properties with Real Numbers: The Secret of Subtraction
An interactive boosts mathematicians' knowledge of subtracting integers using a horizontal number line by way of multiple-choice, true or false, and discussion questions.
CK-12 Foundation
Sums of Integers with Different Signs: Adding Between 10 and -10
Six questions make up an interactive designed to boost scholars' knowledge of integers. Mathematicians move symbols over a horizontal number line to aid in findings answers between 10 and negative 10. Question types include...
CK-12 Foundation
Prime and Composite Numbers
Nine true or false, multiple-choice, and discussion questions make up an interactive designed to reinforce scholars' knowledge of prime and composite numbers. A number chart reveals every prime number through 100.
CK-12 Foundation
Fraction Comparison with Lowest Common Denominators: Oranges and Blood Oranges
Comparing fractions is the focus of a five-question interactive in which mathematicians use oranges to answer real-world multiple-choice, true or false, and discussion questions.
CK-12 Foundation
Prime Factorization: Chocolate Chip Factoring
An interactive resource challenges mathematicians to show what they know about prime factorization. Five multiple-choice, true or false, and discussion questions use chocolate chip cookies to set a real-world application of the...
CK-12 Foundation
Integers: Tiling a Chessboard with Dominoes
Ten questions make up an interactive all about integers. Scholars answer multiple choice, short answer, and discussion questions using a 4x4 chessboard and dominoes.
CK-12 Foundation
Integers that Represent Different Situations: Football Field
A football-themed interactive focuses on integers. Seven questions challenge scholars to show what they know by way of short answers, multiple-choice, and true or false. An open-ended question followed by a discussion concludes the...
US National Archives
WWII: The Pacific 1939-45 – Japan and the Atom Bomb
Though the scientists who developed the atom bomb did not believe it should be used to end World War II, American President Harry S. Truman and British Prime Minister Winston Churchill were of like mind in their decision to drop the bomb...
US National Archives
WWII: The Pacific 1939-45 – Iwo Jima
Of the images that have permeated history to define American courage, perseverance, and patriotism, the 1945 photograph of United States Marines raising the flag at Iwo Jima is one of the most well known. After researching the pivotal...
US National Archives
WWII: The Pacific 1939-45 – Pearl Harbor
Though December 7th, 1941 was a day "which would live in infamy," World War II had provided many infamous days, events, battles, and atrocities in the years before. So why were American forces so surprised when Japan attacked Pearl...
US National Archives
WWII: The Atlantic 1939-45 – Battle of the Atlantic
The most dangerous line of attack during World War II wasn't the German planes soaring above Britain, but the U-Boats cutting off their supplies of food and equipment. Learners research the Battle of the Atlantic, the German campaign to...
US National Archives
WWII: Asia 1939-45 – Singapore
The fall of Singapore in World War II was shocking news for the Allied forces—but why? High schoolers explore primary source documents and videos to determine why February 15, 1942 was a wake-up call to the British Empire and its allies...
School Science
The Big Bang Time Machine
Scholars take off on an interactive spaceship to explore a historical timeline of the big bang theory. They learn about the evolution of mammals and humans, the formation of stars and planets, and the chemical composition of the early...
US National Archives
WWII: Asia 1939-45 – Burma
Because World War II encompassed most of the globe in one way or another, many pivotal battles and events are not as visible in the history books, leaving veterans of these conflicts feeling overlooked by more famous skirmishes. High...
US National Archives
Eastern Europe 1939-45 — Stalingrad
Acts of civilian courage in Great Britain—and in one case, the island of Malta—often receive the George Cross, instituted by King George VI at the beginning of World War II. After the valiant defense of Stalingrad by its inhabitants,...
US National Archives
Eastern Europe 1939-45 — Ukraine
Was Joseph Stalin desperate or exaggerating the USSR's need for assistance on the Eastern Front in 1942? History students examine two differing opinions on Stalin's position and the reality of the Eastern Front just three years before...
US National Archives
Eastern Europe 1939-45 — Camps
Britain's decision not to bomb German death camps in World War II has provided many questions for historians, but with a primary source analysis lesson, high school students may be a step closer to finding out the truth. Learners read...
US National Archives
Eastern Europe 1939-45 — Berlin
The inevitability of World War II has arrived: Berlin has fallen. Young historians watch contemporaneous footage of the event, analyze primary source documents, and write a news report that details the roles of the Soviet, British,...
US National Archives
WWII: Mediterranean and N. Africa 1939-45 – Where Will the Allies Invade?
An interactive asks learners to act as German intelligence agents and examine documents found on the body of an English soldier wash ashore on the cost of Spain. Using the documents, the agents are asked to predict where the Allies were...
US National Archives
WWII: Mediterranean and N. Africa 1939-45 – Monty
Is Field Marshal Montgomery the right man to command the land forces in France for D-Day? That's the question facing young historians as they explore an interactive resource that focuses on the Mediterranean and North Africa theatre from...
Anne Frank House
Anne Frank House: The Secret Annex
A virtual tour of Amsterdam's Anne Frank House permits viewers to not only visit the Secret Annex but to also view photos and videos, examine a timeline of events, and learn about the fate of Anne Frank and her family.
US National Archives
WWII: Western Europe 1939-45 – End of the War
You are Winston Churchill, and on May 9th, 1945, you receive millions of grateful cards and telegrams. How do you respond? High schoolers put themselves in the Prime Minister's chair with an activity that prompts them to respond to a...