I’ve always enjoyed this lesson and its one that really helps students develop an expert grasp of a difficult series of events. Students read through background knowledge before completing a card sort of 21 precise pieces of evidence. I then encourage students to make links between these factors and to identify which pieces of evidence they find the most compelling. I worked in the Middle East when creating and delivering this lesson so it carries real meaning for me and I hope you can see how that has come across in the level of detail and precision. Above all though I hope your students enjoy this as much as mine did and that it helps them arrive at a conclusion to the question 'why was there a revolution in Iran in 1979?'