Tutor has to be informed about cancellation of class 24hrs prior atleast else it would be counted as class and parents would have to pay for it. This is because the tutor has booked that slot for that kid .
The kid must join the class at the scheduled time.
If you want to reschduel the class, please give the prior message. ( atleast 24 hrs before )
Teacher will wait for the kid to join the class for first 15 mins, if the kid doesn't join and the parents don't reply or give any info on the same. The teacher will leave the class after that and it would be counted as a class happened.