Course counts
If you select a number of students and do a quick export and include "~(*number_of_classes)" in the fields list, e.g.
last_name
first_name
grade_level
~(*number_of_classes)
Then you will get a list of students with their total # of currently-enrolled courses for the YEAR. So, in S2, it will be "doubled."
If you change to the correct term (semester 1 or 2, or quarter 3, whatever) and SEARCH for
*number_of_classes<6
Then that will find all students who are CURRENTLY enrolled in less than 6 classes for the term you're in.