There are two sources of college grades, one is the usual grades, and the other is the examination results.

The usual score is the usual school attendance, class performance, homework completion and so on.

The exam score is the final exam score. School is different from school. Usually 30%, some schools are 20%, and the remaining 70% or 80% is the test scores. If the score is high, the exam is relatively easy.

So it's better to listen carefully in class. You can learn things by getting high marks, and you don't have to worry about the final exam.