Here I offer a complete Lesson on Maths A level suitable to Edexcel C2 Differentiation. This set of notes completely covers the chapter with 56 worked examples.With over 20 years experience in teaching A level mathematics(Pure mathematics and Mechanics) I offer these notes covering a wide range of problems with complete solutions. In this way I hope to help students achieve a high score in their A level Maths examination. Each Lesson covers theory and formula necessary for the chapter and step by step explanation of all solutions. Problems are arranged in an ascending order of difficulty reaching A level standard. Applies also for any students studying at this level. It includes: 1) Stationary points /Turning points ie max or min points and points of inflexion. 2) Finding the intervals for an increasing or a decreasing functions. 3) Distinguishing the nature of such points ie whether a max or min or point of inflexion. 4) Solving various problems, using Differentiation. Problems involving max or min area, Volume, Min Cost, etc. A variety of shapes ie cylinders, cubes, rectangular boxes etc