Serangoon Garden Secondary School (SGS) (实勤中学) is a government co-educational secondary school located in Serangoon, Singapore. SGS was founded in 1959 as Lichfield Secondary School at Lichfield Road. In 1969, the school absorbed the neighbouring school, Hwi Yoh Vocational School and in 1970, became Serangoon Garden Secondary School (SGS). It became a bilingual secondary school with both English and Chinese streams, with facilities for the teaching of academic, technical and commercial subjects. In 1984, it became a purely English stream school with the last batch of Chinese stream graduating in the same year. The School moved to its current premises in mid March 2004.