Two-year core curriculum in the classical Ashkenazi-Lithuanian tradition including a semest in each of: Shabbat Nusach, Rosh Ha'Shanna, Yom Kippur, Shlosh Regalim. The entire liturgical year is covered, including life cycle. The pedagogy is focused on mastery of Nusach as an improvisational medium. Study sources: an extensive collection of sheet music developed by Hazzan Kessler, based on the work of earlier authorities, particularly Max Wohlberg. Printed music includes sections of scalar and motivic analysis along with samples, e.g. multiple settings of texts. Classes include coaching of talmidim as they develop their own style and improvisational skills.