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Ap stands for Advanced Placement and it connects highschool students with college level studies.
There are many kinds of skills that you need in AP classes.
Because there are many reading that you need to understand, the most important part is to analyze and find the most essential part of the reading
In the AP class, there are many eassay tasks you need to write. so since you have to write many eassays in AP class, having a good writing skill is necessary.
AP class is a high level class which teaches university level to highschoolers, in order to get a and pass the exam, you need to work steadily and hard.