Hitler wanted land that the Treaty of Versailles had given to Poland. When Poland refused to give it up, Germany attacked using Blitzkrieg, a fast and destructive method of warfare. Poland was quickly defeated, and Germany took control of most of the country.
In 1940, Germany captured Denmark and Norway. Soon after, German forces attacked the Netherlands and Belgium. Both countries fell quickly, even with help from British and French troops. Germany then moved into France, trapping Allied soldiers at Dunkirk. More than 300,000 troops were rescued by British boats.
By June 1940, Germany controlled nearly all of Europe. England was the only major nation still free. President Roosevelt sent supplies to help the British defend themselves. Congress also began a draft, requiring American men to register for military service. Many Americans wanted the United States to stay out of the fighting. These people were called Isolationists.
In September 1940, Germany began bombing England, but the Royal Air Force shot down many German planes. Germany also took Greece and parts of Africa. Despite having signed a treaty with Russia, Hitler attacked Russia in 1941 to gain resources such as oil and grain.
As Germany expanded across Europe and into Russia, Japan continued taking land in Asia. The world was fully at war, and the United States was preparing for the moment it would be forced to join the fight.
Drag the vocabulary words to their correct definitions!
Students create a simple diagram showing how Blitzkrieg (“lightning war”) worked. This helps them understand why Germany was able to conquer so many countries so quickly.
How to Do It:
Students divide a notebook page into three horizontal sections labeled:
In each section, students draw a simple sketch or symbol and write a one‑sentence explanation.
Materials: notebook, pencil
Optional Extension: Students add a fourth section explaining why Blitzkrieg was less effective against Britain.
Students explore how the Danish Resistance used coded messages, subtext, and secret networks to rescue over 7,000 Danish Jews. This tactile project combines literary analysis of subtext with the real-world logistics of underground resistance movements during Nazi occupation.
How to Do It: Read Chapters 4 and 11 of Number the Stars by Lois Lowry, paying close attention to how Uncle Henrik and Mama use coded language (like "is the weather good for fishing?" and "bringing a carton of cigarettes") to speak about rescues right in front of Nazi soldiers. Students construct a two-tier cardboard cipher wheel (a Caesar Cipher) secured with a brass paper fastener. They use their wheels to encode and decode messages based on the novel's themes, such as coordinates for Henrik's boat or warnings about checkpoint locations.
Materials:
Optional Extension: Students write a short "innocent" letter home that secretly contains hidden details about an escape plan using the exact metaphor styles (like the "cigarettes" code) found in the novel.
This complete history unit includes research passages, organizers, writing tasks, quizzes, activities, and website research — all in printable and digital formats. Everything you need to teach The Great Depression and World War 2 with confidence.
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