I don't follow the school calendar, no. Unless you have all teachers as clients, there's really no need to. I don't charge more for those times either. Christmas break, March Break, Summer break - unless I choose to close, is just like any other block of time, with a couple stats thrown in the mix. The only breaks I observe during the year are my own, self imposed holidays. Of course I discuss my ideas for timing with clients to see if we can work together to make it work for all of us. I went to Puerto Rico a couple weeks ago and 2 of my families chose to take their vacation at the same time...worked out well. Other than that, regular hours, regular pay.