In history, we became senior military and government officials, entering a top-secret underground war room in the hall! We explored a file of classified evidence, each exhibit allowing us to piece together the complicated puzzle of the build-up to World War II. We studied photos of post-World War I Germany, read Neville Chamberlain’s ultimatum speech and tracked the German army’s movements carefully on a map of Europe, predicting what their next move might be at every stage. We then put our understanding to the test by sequencing the steps in the build-up and explaining the full, complicated picture to our partners!