High Quality Content by WIKIPEDIA articles! Plano Senior High School (commonly Plano, Plano Senior High, or PSHS) is a public secondary school in Plano, Texas, USA, serving students in grades 11–12. The school is part of the Plano Independent School District, with admission based primarily on the locations of students` homes. Plano is a two-time Blue Ribbon School and a Texas Exemplary School.