If you'd like to tally your instructors' numbers (how many classes and customers they've taught), Punchpass will tell you.
From the Punchpass home page, click on Reports.
Then you can select the Instructors Report from there:
There you'll see each instructor's total number of classes taught & how many students in each class.
If you'd like even more detail, click on an instructor's name. There you'll see enrollment numbers for each individual class time that instructor has taught.