Parkside High, the second secondary school erected in Dundas, was built in 1960, on 4.6 acres of land, to alleviate the crowding at Dundas District High School. Its name comes from its locale, next to the Dundas Driving Park. It was built as an Arts and Science school and modified later to enable options in the arts, science, business and commerce areas. The student population represented a good cross section of the community, with students coming from the rural areas of Flamborough as well as the town.
A 1961 addition included 17 classrooms and allowed for a limited vocational program with shops constructed with available federal grants. The library was built in 1976.
The Parkside campus was adjacent to the beautiful Dundas Driving Park. The students accessed the large playing fields, tennis courts, and outdoor volleyball and basketball facilities.
The school facility included a large gymnasium, art room, five computer labs, science labs, dramatic arts studio, music room, academic areas, etc.
Parkside High School distinguished itself with a long tradition of academic and athletic excellence. In the 1960’s, it was selected as a pilot school for the new provincial credit system. The Gauss Mathematics Contest, written across Canada, was started at Parkside. Parkside won two Ontario Basketball Championships and former student Greg Anderson held the Canadian schoolboy record in the 1500 metre race.
With its long academic and arts traditions, Parkside held an annual arts festival. The Drama Department has been successful in the Sears Festival and was elected for the 1997-98 provincial showcase. The well-known school orchestra has also won several provincial honours.
In 2014, Parkside was closed with the opening of Dundas Valley Secondary School.