answer:I would pick the individual school you are interested in and ask the administration who accredits them, The standard umbrella accrediting organization for Independent Day School is NAIS, The National Association of Independent Schools. I am a little suspicious of young children who are supposed to design their own curriculum. And I found it curious that there was no mention of accreditation on the web site. My experiences have been with traditional Independent Day Schools, including The Town School in NYC and Germantown Friends School in Phila. (My then-husband was headmaster, and there wasn’t anything I didn’t know about the school.) He then went on to be the Executive Director of The New York Association of Independent Schools, the accrediting outfit for NYS schools. I loved having my kids at a Friends (Quaker) School.