The Grade Book and Comments report is a wonderful report. It shows student grades and teacher comments for the selected school and marking period.
Before, you could only get this information for currently enrolled students. But now you can also see grades and comments for students who were dropped from the class.
Just select the Enrolled and Dropped option from the Class Enrollment Status parameter. In the exported report, there is a new column, Enrollment Status. Here you can see if the student is currently enrolled or was dropped from the class.