When setting up your programs you may have noticed the choice of Monthly Membership or Class Credit Membership. Below is a screen shot of this.
Monthly Memberships are programs that you charge tuition. It is not limited to monthly. It could be weekly, bi-weekly, monthly, or paid in full for any given length.
Class Credit Memberships are for programs that you sell a package of classes instead of tuition. An example of this would be selling a package of 30 class.