This App should have 3 main screens.
Initial setup will allow registering as a coach.
then its a main screen(excel file mockup) that allows to mark if student is present or not(attendance)
you have an option to edit and add new student.
New User: [login to view URL]
Edit User: [login to view URL]
PS: Both New & Edit screens should have the ability to take a picture of the student (New) and display student's photo (Edit page)
Calculations: If a student chose to have a class pack membership(not monthly unlimited) then the system has to calculate how many classes are used from the pack. So if the student signed up for 3 pack classes and shows up for the 4th on without paying for renewal the system should mark it as -1 so we can catch up with payments later.