Can I pay per 4 lessons every time instead of a monthly fee?

At My Drum School, we have a monthly billing process to make it easier to manage the transactions of all 800 students. Each term (3 months) consists of a total of 12 lessons. If there are 11 lessons in a particular month due to public holidays, the following term will have 13 lessons to compensate. To avoid late administration fees, we kindly request that payments are made before the 1st of each month. Thank you for your understanding.