The St. Clair Catholic District School Board (SCCDSB, known as English-language Separate District School Board No. 39 prior to 1999 ) is the separate school board that manages Catholic education in the county of Lambton including the city of Sarnia as well as in the regional municipality of Chatham-Kent including the city of Chatham, in southern Ontario, Canada. The Board manages 23 elementary schools and 2 secondary or high schools. Elementary schools The secondary schools are: The Board was formed by an amalgamation of the Lambton County Roman Catholic Separate School Board and Kent County Roman Catholic Separate School Board, which took place in 1999.