Crotched Mountain School, a program of SHNH, hosts innovative special education, recreation, arts, music, and vocational programming for students, aged 5-21, who are on the autism spectrum, and/or have disabilities and other challenges that are better supported in an alternative, least-restrictive environment to their local public school system. Students have the option to live year-round in the appointed residences on the sprawling campus located in Greenfield, New Hampshire. Situated on thousands of acres of preserved habitat, CMS offers a therapeutic environment in which students are encouraged to explore and thrive. The school is fully licensed by the New Hampshire Child Care Licensing Unit as well as the New Hampshire Department of Education, and Massachusetts Department of Early Education and Care and is approved to serve up to 105 students. Residential ratios vary from 1:1 to 2:1 and class sizes range from 8 to 10 students. The residential program operates 365 days a year; the education program operates on a 220-day school year with 6.5 hours of instruction per day.