To maintain your valid instructor certification, you must teach at least one class per year (a class is defined as 2 or more students taught and issued certificates on the same date) and maintain your monthly membership. The year starts when you complete your initial instructor course. Canceling your membership (subscription) or failing to teach at least one class per year will result in the need to retake the instructor course at a rate minus the cost of the supplies provided in your initial instructor course.