I offer clients sick days in direct proportion to the number of days per week their child is enrolled. For example: someone enrolled for 5 full days per week will get 5 days per year whereas someone who has 3 days per week will get 3 sick days. They are used in order of absences and not stored up, are non accumulative and not transferrable between siblings. I never charge for my sick days or vacation time. However, if I'm quite ill, but not quite ill enough to work, I will notify parents that I'm in rough shape, but open none-the-less. They can make the call to bring in the kiddies or not as they'll pay either way.