Norwell District Secondary School, formerly known as Palmerston High School, and often simply called Norwell or NDSS, is a mid-sized composite high school located in Palmerston, Ontario. The school serves an area of approximately 500 km², including the communities of Palmerston, Harriston, Drayton, Clifford, Moorefield, Rothsay, and for French Immersion, students from more distant towns such as Mount Forest.