Lakefield College School (LCS or sometimes 'The Grove') is a coeducational boarding school located north of the village of Lakefield, Ontario, Canada. The school's motto is Mens Sana In Corpore Sano ("A sound mind in a sound body"). It was the first Canadian member of the international affiliation of schools called Round Square. Lakefield College School is grateful for the volunteer support of His Royal Highness, The Duke of York '78 (a former student), a member of the Canadian Royal Family. He also serves as patron of the Friends of Lakefield College School. In 2007 the Headmaster, David Hadden, announced that the 2007–2008 school year would be his last at the school. In early 2008, David Thompson, the Principal of Greenwood College School and LCS trustee, was appointed as his successor. Mr. Thompson resigned his position, effective June 30, 2010. Sarah McMahon was appointed Interim Head of School for the 2010/11 school year, effective August 1, 2010. LCS was founded in 1879 as Sparham Sheldrake's Preparatory School for Boys or The Grove and was later named Lakefield Preparatory School. The current name was given following the Second World War.