The extracurricular activities offered at Plano Senior High School are many and varied due to the school's large size. There are chapters of national organizations, such as the National Honor Society, and clubs founded by Plano students, such as Acoustical Word, in which students play guitar and recite poetry. Service organizations such as Key Club coexist alongside clubs which have a primarily social or recreational purpose. The usual range of athletic and music organizations are there for students to join, in addition to Plano's other clubs.