At the time of lesson, call the student right away at the scheduled time, whether or not the student is online. In the case that the student appears offline, you should try to call anyway.

If any of the following occur, send Kevin a message:   

- Online but no ringtone

- Online with ringtone but no answer

- Offline and no ringtone

- Offline with ringtone but no answer

Please make sure to send the message after only one minute, do not wait until a few minutes later or it may be too late. Don't hesitate, just send a message. This way, Kevin can send the student or their parents a message as soon as possible. 

It is important to always call the student on time, whether the student is online or offline. Otherwise the teacher should give the student a make-up lesson.