Classes are 10 weeks, 3 hour classes unless otherwise noted. Porcelain Clay is $43 per 25 lb. bag, all other Clay is $38 per 25 lb. bag, which includes glazing and firing, and must be purchased from the school. Open studio time is included. See the Open Studio Hours page for days and times. All students need to provide their own tools. 6 to 8 students per class.