I charge teachers year round. I don't set my charging policies by employer. My bills need paying year round. If a teacher joins my day home, they know that they are expected to pay for the space during the summer regardless of whether or not they use it. Just like everyone else pays for their space when they are on family vacation or for any other reason they aren't attending on their registered days.

Since your teacher has a term time contract only, you have the option of considering if you are even willing to take this child over the summer. You said you were looking forward to not having this child in the summer months so don't feel obligated to offer your services if you don't want to.

If you do decide to take the child over the summer months, then be really clear that the hours are standard business hours - not extended hours.

I have two client's who come 30 mins before opening. They pay for that time because I don't work for free and it's not unreasonable to be compensated for my time. The ability to come before opening time is based on true need (i.e. to get to work on time) but on days they are not working, then they don't need early drop off and therefore it's not available. They are required to communicate with me if they aren't arriving early by the night before. If ever I am up and ready to start work for the extended hours and they don't show up until regular time without prior notice, they lose the right to have extended hours since they clearly don't actually need them.