I too avoid PT'er and always have. The only time I've done it is when a current FT'er dropped days due to mat leave but intended returning to FT plus the new sibling. Having been burned doing that last time, even this will not be accommodate in future.

I have one child who is here 4 days a week - my only ever PT child who I took because I had three vacancies and was getting desperate. I kick myself now for breaking my own rules. His empty Wednesday has sat empty from the get-go when he started in Jan., and as no one works one day a week, it will likely be a loss I incur for the full 5 years he's here before starting school.

It might not sound like much in terms of vacancies but one empty day a week x 52 weeks in a year is the equivalent of two months fees. Sure adds up to being a loss.