When creating an Academic Course, Activity, or Advisory, there is an option for Print on Report Card.
The Print on Report Card checkbox is used to ensure the Course, Activity, or Advisory is included as a "Course" in the NEW Report Card Builder. In order for the Grades to display, the Grade Plan Group(s) and Grade(s) needs to be attached to the "Course" and included on the report card builder.
If the Print on Report Card checkbox is enabled AND the "Group" (Activity, Advisory, Academic) is selected to be included within the New Report Card Builder, then the Course and the corresponding Grades will display.
If you would like to display the enrollment only for an Activity or Advisory, then only mark the Print on Report Card checkbox, do not attach a Grade Plan Group to the Activity or Advisory and mark the Group type to display on the NEW Report Card Builder. This would mean the Group would show such as Yearbook, but would not display a grade for that Activity or Advisory.