This lesson plan aims to help students understand the social and historical context of the play An Inspector Calls. Students will first make predictions about the plot based on a book cover image. They will then learn about key historical events between 1912 and 1945 through a matching activity and discussion. This will help them answer why Priestley wrote the play in 1945 but set it in 1912. Formative assessments include questioning, matching, predictions, and a concluding paragraph. The lesson uses collaborative learning, prior knowledge activation, and visual organizers to engage students in understanding the important political climate surrounding the creation of the play.