Classreport.org provided free website for the Class of 1967 from Upper St Clair High School for the members and guests of this class to stay informed of reunion events and updates . Upper St. Clair High School Alumni, Class Reunions, Yearbooks, Panthers Classmates, and more! Upper St. Clair High School (USCHS) is a public secondary school in Upper St. Clair, Pennsylvania and the sole high school within the township's namesake school district. .