Bill Crothers Secondary School is an athletic based High school in the community of Unionville in Markham, Ontario, Canada. It is the newest secondary school in the York Region District School Board. Named for former Olympic athlete and Chair of the York Region District School Board, Bill Crothers, the school opened its doors to Grade 9 and 10 students in August 2008. The school is 32 acres (130,000 m²) and cost an estimated $32 million to build.