Middle school districts for the Commonwealth of Massachusetts. The district boundaries were created from a database provided by the Massachusetts Department of Education. This database contained the name of each municipality, the name of the elementary, middle, and high school district with which each municipality was associated, and its unique municipal ID. This and associated information (e.g., start and end grade) were joined to a multi-part shape file representing the municipal boundaries. The join was on municipal ID. The districts were created by dissolving municipal boundaries on elementary district ID.