Mount Pleasant High School is a public high school located in Mt. Pleasant, MI. MPHS offers college preparatory courses to students in grades 9-12; technical preparatory courses from the Gratiot Isabella Technical Education Center, as well as Advanced Placement courses in a variety of academic subjects. Mt. Pleasant High School enjoys state-of-the-art academic, arts, and athletic facilities. MPHS is the largest high school within the Gratiot Isabella RESD, with an average enrollment of 1,100 students. At Mt. Pleasant High School – Tradition Never Graduates.