Full time to part time? How to determine rate or days?

[5 Little Monkeys]

I have always had at least one teacher's child in my dc. I actually prefer them as their hours tend to be shorter, they take off the full 2 week's at xmas and 1 week at spring break and they have all kept their child at home because I charge them the holiday fee which is $10 less per day.

For summer's, they are allowed the option of sending child and paying, not sending child and paying the holiday fee or if I can find a summer replacement than they get the summer off free of charge and start back up in September.

[gravy_train]

PS - I have friends who are teachers and continue to pay full-rate throughout the summer and some pay 50% of their full-time rate.