The Superior-Greenstone District School Board (known as English-language Public District School Board No.
6B prior to 1999[2]) is a public school board in the Canadian province of Ontario, with jurisdiction for the operation of schools in eastern Thunder Bay District.
Superior-Greenstone District School Board is located in Northwestern Ontario and covers a vast area of 45,100 square kilometres.
The board is responsible for providing public education, and its 15 schools serve the communities of Beardmore, Geraldton, Longlac, Nakina, Dorion, Nipigon, Red Rock, Schreiber, Terrace Bay, Marathon and Manitouwadge.
Its head office is located in Marathon, on the north shore of Lake Superior.