The MacDuffie School is a private institution located in Granby, Massachusetts. It offers accelerated classes for middle and high school students gifted in academics. The school was established in 1890 by John and Abby MacDuffie.

The initial enrollment of 70 students attended classes at the Samuel Bowles House in Springfield, Massachusetts. Today the school now hosts approximately 200 students at their Granby campus. The student population is comprised of an equal blend of males and females from several regional states and countries. Students can choose to board at the school or attend only the day program.

The curriculum is a rigorous liberal arts-based program that focuses on leadership and diversity. The students are expected to contribute equally to their education and community activities. The school prides itself on graduating students who are college-ready.