[1] Springfield Township became one of the six constituent municipalities of the Union County Regional High School District when it was established, joining Berkeley Heights, Clark, Garwood, Kenilworth and Mountainside.

The original building contained 27 classrooms, three science labs, three shops, a library, a cafeteria, a gymnasium, an auditorium, and offices.

A former Civilian Conservation Corps administration building was moved to the site from Meisel Avenue in March 1942 to serve as a classroom for the vocational program in agriculture.

[9][10] The addition contained 20 classrooms, three science labs, two shops, two music rooms, a gymnasium, and offices; renovations were completed to portions of the original building at the same time.

[11] At Dayton, the addition of three science labs, two classrooms, two music rooms, an auxiliary gymnasium, and an instructional media center, and various renovations and expansions were completed by September 1973.

[30][31] The boys basketball team won the Group III state championship in 1950, defeating Union Hill High School in the tournament final.

[35] The boys tennis team won the North II Group I state sectional championship in four consecutive years 2006, 2007, 2008, 2009 and the Mountain Valley Conference in 2008 and 2009.

[36] The 2001 team won the Group I title with a 3–2 win against Haddon Township in the tournament finals at Mercer County Park.

[37] The 2008 team won the North II, Group I state sectional championship with a 3–2 win in the tournament final over Ridgefield Memorial High School.

[38] The boys tennis team won the 2007 North II, Group I state sectional championship with a 4–1 win against Ridgefield Memorial High School.

[39] The team moved on to win the 2007 NJSIAA Group I state championship, defeating Pennsville Memorial High School 4–1 in the final matches.