Student Privacy
One very important thing in teaching is to know the copyright laws and privacy laws for when it comes to teaching in your country. As a teacher you also want to make sure that you are allowed to record sessions and if not, make sure that you get permission to record and use those recordings from your students and their parents if applicable. Using videos from classes is important not only for advertising, but also for your own reference and review in the future. So always make sure that you can record videos of your students and use them in the future with their permission.