Arcadia Falls by Carol Goodman

Great Read. Set in an upstate NY town, Meg and her daughter Sally move to a remote boarding school that focuses on the arts. Meg as a teacher and Sally as a student. The students and staff participate in many rituals that follow along with the history of the school. When a student dies, mirroring the death of another student in the 1940's at the start of Arcadia's school history, many questions arise and the mystery deepens.
It was definitely a book that I couldn't put down.