KS3 level 5 covers practical skills and a GCSE topic; Hooke's law in the context of sport and injuries in tennis. This is part of a set of lessons to engage year 7 to 13 students (KS3, KS4 and KS5) with STEM subjects ( forces, data analysis and materials' technology) in the context of sport, and particularly Tennis as June-July is the season of many great tournaments. Why re-invent the wheel? Invest and enjoy for a many teaching groups and a few years to come.