I was invited to the Aufnahmetest. What should I do to prepare?

After applying to the Studienkolleg and receiving the invite for Aufnahmetest, what I recommend is: first go to the Studienkolleg website and download the mock exams to know exactly what subjects the Aufnahmetest covers. After that, start preparing, studying with resources from the internet, and practicing with exercises from Aufnahmetests. Here, the more you practice, the better.