Yes, we try to maintain a wait list when a session fills up. Usually, families register for a first choice that has reached capacity at the time of your registration.
Often, however, the reason there are no more student spaces is due to a lack of volunteers. Volunteers get priority registration, meaning you will get into your desired time(s) if you are willing to help.
Occasionally, however, our limited spaces do fill. Our facilities, and the way we choose to use them, only allow so many student spaces per session.