I have been teaching online nationwide for over 20 years – worldwide, or on-site in Düsseldorf and Munich. The lessons are structured as follows: In the first lesson, I get an overview of the student's knowledge level and work on the lessons' tasks. From the second lesson onwards, we complete the homework from the lesson and work on comparable tasks from books and task sets from other publishers. Teachers often simply use the same tasks from other books or workbooks, as well as class test trainers. At the end, we discuss previously solved class tests from the same or other schools. It is a good idea to then work on these independently and compare them with my solutions.