Typically, the therapist works with the school to establish a therapy schedule that works best for everyone. There is usually a staff member such as an aide, who helps to make sure the students log in for their sessions at the right time.
For students at a brick and mortar school, the staff can organize the login facilitation in a way that works best for them. Sometimes that means one person does all the login facilitation, or it can be divided up between various teachers and staff. Often times the students become quite independent, and very little facilitation may be needed.