Graders choose responses when assessing students' work. They choose responses for every rubric item.
Here is part of the interface shown when starting to assess a student's work.
A grader (perhaps the instructor, usually someone else for a large class) clicks on one or more responses for each rubric item. Here is the rubric item list after assessing a student's work:
The "clickable rubric" system means that each submission can be assessed in a minute or two.
Skilling generates messages for students, based on the rubric item responses that graders select. Each student gets personal formative feedback for every exercise.