ActiveNow allows you to decide which fields should be visible/ edited for the clients and instructors.
Configuration of the Progress field
Go to Settings, General and in Custom fields settings section click on Additional client-related fields.
Add a Progress field that can be changed via instructor.
Filling up the Progress field via instructor panel
After granting the option to edit the field, information about the progress will appear in the panel after entering to the e-register.
Progress can also be checked from the Participants section.
Checking the Progress via participant/parent account
After sign in to the client panel go to My personal details and in Other information section you can check the instructor notes.