Sometimes that can happen. However, you must trust that it is not a big deal. Each week’s lesson is designed to reinforce and introduce new information. So that if there is something you don’t understand, it will become clearer in the following lessons. The important part is to read each one at least five times and answer the questions. The course is designed to work. If you do your part, the promise is that the course will provide you with everything you need to complete it successfully.