We went to St Marks a few years ago and used the after care. We liked them, but during the year the teacher had a family emergency and had to leave. They found a substitute after a while, but it wasn't the same. The aftercare supervisors were nice and good with kids. That same year the school director and teacher of 30 years retired. Since we left it seems that the entire staff has changed so I don't know if my comments will help you much. It was much more affordable than other Montessori schools though.