Yes, marking attendance for every session attended is mandatory.

You will only be able to mark attendance in the 15 mins before and after the session start time. eg if your session starts at 7:00 PM, you can mark attendance only between 6:45PM and 7:00 PM. Just in case you forget to mark your attendance, please reach out to the Center Manager within 30 mins of the class getting over to avoid a No-Show.