A high school opened on the second floor of the Easttown School in Berwyn. In June 1896, five students graduated.
The joint Tredyffrin-Easttown High School opened.
The high school became a junior-senior high school, serving Willistown, East Whiteland, the Borough of Malvern as well as Tredyffrin and Easttown townships.
March 5, 1954
Groundbreaking ceremony for new senior high school of The Paoli Area High School System
May 17, 1954
School board votes to name the new high school Conestoga Senior High School. A contest was held to name the school. A ninth grade student suggested the name Conestoga because the old Conestoga road passed through all six communities which send students to the new school.
October 27, 1954
June 9, 1955
Last commencement of the Tredyffrin-Easttown Senior High School
September 9, 1955
Conestoga High School opens with a student enrollment of 549 and a faculty of 35.
19 room addition changed the shape of the high school from "J-shaped" to a "U-shaped" building. Student enrollment was 1036.
20 room addition changed the shape to an enclosed rectangle.
The library was enlarged and named the Karl Zettelmoyer Library in recognition of his years as principal from 1957-1971.
A new gymnasium, named for John C. Rittenmeyer, principal from 1971-1988, was added as well as a new science wing, and communication center.
Fourteen general-purpose classrooms and ten science labs/classrooms were added. The cafeteria has been enlarged and modernized. The entire music area was reconfigured. A new 3,660 square foot choral classroom houses the growing choir. There is a new keyboard lab with updated electronic music equipment and new practice rooms. In the family and consumer sciences lab, kitchens were completely reconfigured and renovated. A new and welcoming main entrance includes a spacioius lobby (see picture left) and reception area.
Outside Conestoga High School, all parking areas were reconfigured and landscaped.
1915 - 1940: S. Paul Teamer
1940 - 1952: Wallace S. Brey
1952 - 1959: B. Anton Hess
1959 - 1972: Karl A. Zettelmoyer
1972 - 1988: John H. Rittenmeyer
1988 - 1989: Clifford Franks, Acting Principal
1989 - 1994: Daniel Waters
1994 - 1999: Kaye Pollock
1999 - 2002: Susan Yates
2002 - 2009: Timothy Donovan
2009 - Present: Amy Meisinger