The authors explore the teaching of trigonometry using a method developed by Jeremy Burke of Kings College. A series of lessons was planned using an approach which looks at moving from a mathematical description of the topic, to a sequence plan, to a set of activities, which students can use to help them come to understand the topic. This is referred to as "MNO" (Burke and Olley 2008). "M" is the map of the terrain to be covered, in this case the mathematical structure of the topic, connections and potential problems that students might encounter. A consideration of the "map" might be inaugurated with the question, "what do we mean by...?" In this case, what do we mean by "trigonometry". "N" is the narrative, the sequencing of the lessons and activities--the story being told. "O" is "orientation" the activities which will serve as strategies to facilitate students engagement with the topic. (Contains 1 figure.)