I have a mom who is trying to get pregnant and also a school teacher. I am not sure what they plan on doing for the summer or what they want to do if she gets pregnant. I offer school teachers the summer off payment free if I can find someone who only needs a summer spot. If not, they can either send the child and pay full time or keep the child home and pay my holiday fee.
For any mom that wants mat leave off, I will likely offer the same kind of idea. If I can find someone that wants the spot for just a year than great, if not or if the new parent leaves before the year is over the mom on mat leave would have to pay or forfeit the spot and I would just fill it with a new kid.