Koidu Secondary School was created in 1965.
Koidu Girls Secondary School was created in 1952.
Koidu Secondary School's motto is 'Christus Via Veritas Vita'.
Koidu Holdings was created in 2003.
Deyi Secondary School was created in 1980.
Fraser Heights Secondary School was created in 1999.
Wellington Secondary School was created in 1967.
Stratford Central Secondary School was created in 1844.
Yishun Town Secondary School was created in 1986.
Stanley Humphries Secondary School was created in 1912.
Beatty Secondary School was created in 1953.
Bedminster Down Secondary School was created in 1955.
Seaquam Secondary School was created in 1977.