Being a government secondary school, Commonwealth Secondary School offers three academic streams, namely the four-year Express course, as well as the Normal Course, comprising Normal (Academic) and Normal (Technical) academic tracks.
O Level Express Course The Express Course is a nationwide four-year programme that leads up to the
Singapore-Cambridge GCE Ordinary Level examination. Commonwealth Secondary School had consistently stellar performances in the
Singapore-Cambridge GCE Ordinary Level examinations. In 2007, 99.5% of the graduating students are eligible for
Junior College, and the school was one of the few with students scoring 7A1s and above.
Academic subjects The examinable academic subjects for
Singapore-Cambridge GCE Ordinary Level offered by the school for upper secondary level (via. streaming in secondary 2 level), as of 2017, are listed below.
Notes: • ''Subjects indicated with ' * ' are mandatory subjects.'' • ''All students in Singapore are required to undertake a Mother Tongue Language as an examinable subject, as indicated by ' ^ '.'' •
"SPA" in Pure Science subjects refers to the incorporation of School-based Science Practical Assessment, which 20% of the subject result in the national examination are determined by school-based practical examinations, supervised by the Singapore Examinations and Assessment Board. The SPA Assessment has been replaced by one Practical Assessment in the 2018 O Levels. Normal Course The Normal Course is a nationwide 4-year programme leading to the
Singapore-Cambridge GCE Normal Level examination, which runs either the Normal (Academic) curriculum or Normal (Technical) curriculum, abbreviated as N(A) and N(T) respectively.
Normal (Academic) Course In the Normal (Academic) course, students offer 5–8 subjects in the
Singapore-Cambridge GCE Normal Level examination. Compulsory subjects include: • English Language • Mother Tongue Language • Mathematics • Combined Humanities A 5th year leading to the
Singapore-Cambridge GCE Ordinary Level examination is available to N(A) students who perform well in their Singapore-Cambridge GCE Normal Level examination. Students can move from one course to another based on their performance and the assessment of the school principal and teachers.
Environmental education In 2001 the school started a Green Club. One of the projects was the adoption of the
mangrove boardwalk trail in the
Sungei Buloh Wetland Reserve as part of the Adopt-A-Park Scheme launched by the
National Parks Board. In 2006, the staff endorsed the goal of working towards becoming a Centre of Excellence for Environmental Education. A group of teachers was identified to develop a customised environmental education curriculum for the school, starting with the Secondary One students in 2007. 2006 also saw the school clinching the Lotus Award in the Singapore Environment Council's Green Audit. The school converted the school pond into a Constructed Treatment Wetland to recycle used water to water the plants in the school compound. Commonwealth Secondary School became the Centre of Excellence for Environmental Education in 2008. On 28 March 2014, the school celebrated Earth Hour with
The Amazing Spider-Man 2 cast,
Andrew Garfield and
Jamie Foxx. It was a significant milestone for the school because it is the first time Hollywood came to Commonwealth. The two superstars not only interacted with the 1400-strong audience, they also did their part for the environment by planting a sugar apple and giant lemon bush in the school's Gift of Life Garden. It was a befitting way for the school to kick start her 50th Birthday celebrations. ==Co-curricular activities (CCAs)==