Established in 1881, St. Mary's has striven to form leaders who love God, work hard and are compassionate toward others. We hope to facilitate an engaged community of learners, including our students, parents, faculty and staff. St. Mary's High School was established in 1881 as Saint Mary's Boys High School. A Girls High School was added later, followed by coeducation. In 1989 the school began a junior high school starting with a 7th grade class only, with an 8th grade class added the following year. The junior high school added a 6th grade class in 2011 after Massachusetts moved to a middle school education model. We now offer a fully integrated curriculum over seven years, for students grades 6-12.