Possible Scenarios:

1. When running the GPA and Scores report, you might notice that a student will have a lower percentage score than another student, but a higher GPA score. 


Solution: 

The reason is due to class weights.


Example:

Lets say "Student A" has a 100% in a 5 unit class and 80% in a 1 unit class. Now, "Student B" has 80% in a 5 unit class and 100% in a 1 unit class. Each student will have the same average score, 90%. However, "Student A" will have a GPA of 3.83 and "Student B" will have a GPA of 3.16. (This is considering the 100% = 4.00 and 80% = 3.00)