The document provides information about censorship during World War 1 and instructions for writing a censored letter from the trenches. Soldiers' letters home had to be censored by officers to remove any details about military plans, locations, conditions, or casualties that could help the enemy or undermine morale. The goal was to protect secrets, control public opinion, and maintain support for the war by only allowing positive news to be reported. Students are asked to write a censored letter based on life in the trenches and then practice censoring a classmate's sample letter.