How to judge the quality of education of an art school?
Graduation rate, and time to graduation. A school with a graduation rate of 50% is not a good thing. Nor is a school with average time to bachelors degree of 6 years. Historically, the 'rejection rate' of students applying has also been a sign of school quality, although many schools (Harvard, etc) now game this by providing free or reduced priced applications so as to raise this rate. They also market like mad, so they can pocket your admission fee...