We start off by revising what an average gradient is and how to easily calculate it, then we will look at a cubic function and how to factorize it. We will look at limits and how we use this idea to find the first derivative using the first principles. All of this is quite important as it steers us on our way to better understand what is to follow. We will now learn how to calculate the first and second derivative in a quicker way and what role these derivatives play within functions. We are going to draw cubic functions and have a look at the different shapes it may have. We will walk you through each calculation and show you every step along the way. You will also be asked to draw some functions within the question section as this will help you practice what you have learned. We are also going to calculate maximum and minimum values through our newly acquired knowledge while also learning why they are important and how we can use them in real practical examples. There are practical lessons towards the end of this series to show you exactly how calculus can be used. Each lesson comes with its unique set of questions that you can try, as this will help you solidify what you have learned while the answers are also provided in a separate pdf file so you can check if you worked correctly. All math takes practice and revision, we truly hope that by watching these videos it will give you a good insight into what the key concepts are, how to calculate them and use them. Now you have the means to continue to revisit the lessons so that you don't forget import ideas.