The Science Teachers Association of Singapore (STAS) was officially registered in November 1965. It was founded by a group of enthusiastic science teachers led by the late Mr Sng Yew Chong. Past Chairmen included Mr John Yip, Mr Wee Heng Tin, Dr Ang Wai Hoong, Mrs Carmee Lim, Miss Kan Sou Tin, Mrs Lim Chye Tin, Miss Brenda Yeow, Mrs Catherine Seah and Mrs Nora Teo.
Since its inception, STAS has organised numerous courses, workshops, seminars and field trips (local & abroad) and these have benefited a large number of educators and students. It has also published guidebooks and handbooks, which gave very useful tips to the teaching of science and mathematics at various levels.
STAS works collaboratively with the Ministry of Education, the Singapore Science Centre, the National Institute of Education and various affiliated Science Associations under the umbrella of the Singapore National Academy of Science. Some of the activities organised annually are the Singapore Youth Science Festival, the Young Scientist Badge Scheme, the QUESTA Club and the Science Teachers of the Year Awards.
STAS is honoured to be nominated by the Ministry of Education to receive the Singapore Excellence Award 1998 on behalf of all science and mathematics teachers in Singapore for their excellent performance in the Third International Mathematics and Science Study.