This is a Physics A-level resource from flippedaroundphysics.com, covering energy in simple harmonic motion. It was designed to be used in a flipped classroom. The worksheet leads students through the topic in small, manageable steps. In a flipped classroom, students would complete this task as a homework, prior to a lesson on the topic. Useful links to online information are on the website www.flippedaroundphysics.com. Lesson time can then be devoted to checking students understanding and consolidating learning.