Classroom type instruction, normally on a one-to-one basis, but not excluding group instruction, covering the steps necessary to fly an air exercise. While basic theory of flight, where applicable, would previously have been covered in ground school, some theory may be necessary to explain a point related to the conduct of the air exercise. Essentially Preparatory Ground Instruction should cover the "how to do an air exercise".
This is a presentation given by the instructor when introducing a new exercise. Ideally it should be given within 24 hours prior to the related training flight.