Hi BD,
I'm not aware of any organization doing accredidation for woodturning schools specifically or for craft schools in general.
A few years ago I worked with an individual to take Woodturing classes at Maryland hall for the Creative Arts in Annapoilis. He was partially disabeled and was eligible for a job training program. The job training program would pay tuition at acredited schools.
Maryland Hall was not accredited. However the training program had a procedure to allow some non accredited training. Our major evidence to support his training was that and the Peabody Institute an accredited institution used some of the Maryland Hall classes in their summer program.
I would think that reviewing the AAW list in Jeff's note above would be a good first start. you could ask the schools if they have any accredidation.
Anderson Ranch,
Arrowmont,
Craft Supplies,
John c. campbell,
The Center for Furniture Craftsmanship
are perhaps the best know of the school and certainly have national/international reputations.
happy Turning,
Al