Saint John High School is a high school located in Saint John, New Brunswick, Canada. It was founded in 1805 and is the oldest publicly funded school in Canada. Saint John High School, the oldest publicly funded high school in Canada. Saint John High is a school where learners are actively involved in their education. Students and teachers view the educational process as the pursuit of an inquiring attitude, the development of critical skills and the readiness to embrace new ideas and technologies. Saint John High School is a school based on a solid and traditional core.