UPDATE: Just an update regarding this video. Many people have asked me why I do not use voice overs. I specifically created these videos so that the students I teach have access to additional material outside of class and our LMS. Because we are based in South Africa, where internet access is still a challenge and mobile data costs are high, one of the key goals when I made these tutorials were to keep them as small and bandwidth efficient as possible, thus the lack of voice overs. Never in my wildest dreams did I expect that the videos would become so popular outside of my small circle of students. Please let me know if you would like to see more videos, and if yes, which topics would you like to see covered?