School History   When the Intermediate High School opened, it combined the Evans City and Zelienople high schools. The dress code for the 1964-65 school year required girls to wear dresses or skirts with white blouses and boys to wear straight-legged pants with sweaters and/or button-down shirts. When the Intermediate High School opened after two years of construction, it was only partially completed. The Homecoming parade was introduced at the Intermediate High School in 1982 to promote community involvement and awareness of school functions. Popular clubs in 1964 included Future Farmers of America, Future Homemakers of America, and a bowling club. The sports offered in 1964 were football, basketball, and track. Frank Adamczyk was the first principal of the school when it opened in 1964. In 1965, the graduating class was comprised of 223 students. In 1964, the education of Seneca Valley did not include words, such as "computer" or "software." The groundbreaking ceremony for the school in 1962 was attended by several Seneca Native Americans, including a chief from New York.

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Students in a 1965 business class practice their typing skills on actual typewriters, not computers. The Class of 1965 was the first class to be graduated from Seneca Valley High School.