Hello,
I'm a WIS parent at the primary school and I've not heard of this "turnover" problem. We've only been there a couple of years but we really love it- very warm, nurturing, and very skilled teachers. The physical design of the school is beautiful and I'm continually impressed at the resources they have (music, computer lab, etc )
I can't speak to your specific concerns as I have not experienced the issues you mentioned. I find it a wonderful place for my child and have also met a lot of great parents too. Best wishes to you for your school search
