1. It gets booked
A student picks an open slot on your booking page, or you drop the lesson straight into your calendar. Either way it becomes a session that already carries the class, the student, the subject and the length, and the reminders go out without you touching them.
That matters more than it sounds. A calendar entry is a note to yourself. A session is an object the rest of the product can act on.

Hands forward: a session that already knows the class, the student and the subject.


