1959 - Started as Lichfield Secondary with English Steam intake.
1960 - The School renamed Serangoon Garden Government High School , taking in English and Chinese stream pupils.
1969 - The School absorbed Hwi Yoh Vocational School becoming Serangoon Garden Secondary with facilities for academic , technical and commercial subjects.
1965 to 1974 - The School had Pre-University classes which offer 2 year courses in Arts and Sciences.
1976 - Enrolment peaked with a total of 3000 in 78 classes. On top of that , a few hundred of pupils enroled in technical and economics classes.
1980 - Pre-University Classes restarted with 3 year couse in commerce.
1981 - First batch of Normal Academic Courses.
1984 - Last two Chinese stream pupil graduated.
1985 - School becomes purely English Stream.
1991 - Last Pre-University Classes graduated.
1994 - First batch of Normal Technical Courses.
1997 - Together with Bartley sec , Deyi Sec , Xinmin Sec , Nayang JC , Holy Innocents sec and Sengkang Sec , we formed the North One Cluster of schools.
2000 - The School function as a single session school.
2003 - Intake of our friends from Serangoon Garden Technical School.