Here are two pieces of music. One is by world famous minimalist and film composer Philip Glass and the other is a composition from a pupil. It is clear that the pupil piece is based on some of the ideas of augmentation and diminution that are found in the Glass piece.
Philip Glass: Metamorphosis 1
Listen to both of these pieces and make specific comments about how the pupil has used harmony, dynamics and rhythm. Then, give the pupil two very specific, small, achievable targets to help them get to an A* grade.