You must register first. After registering, log in and your name will be displayed on it. When you go in to study, remember that after learning a subject, you must click Save Hours to count how many hours you have studied. If you want to see how long you have studied, click the control panel, and it will show how long you have studied and how long you have left. Each charter has one to dozens of pages, so you must know all the contents before clicking Save. This will take a long time to study, so as not to be affected by the lack of time when your unit has finished learning.

If you have studied enough hours, but haven't finished it, I suggest that you still finish it all, and you can look at every page, so that you will have a record of learning that physique in your study file.

If you have finished all the subjects, but you still don't have enough time, you can go back to study and make sure you have enough time.

I hope my answer can help you.