If your child entered Secondary 1 in 2024, or is in Secondary 3 this year, they will be among the first students in Singapore to sit the new Singapore-Cambridge Secondary Education Certificate, the SEC (O-Level), at the end of 2027. The GCE O-Level and N-Level certificates are being combined into this one certificate.
Most parents we speak to at our Upper Thomson centre have heard the news, but are not sure what it actually changes for their child. The short answer is: less than you might fear, but a few things are worth planning for. Here is what you need to know.
What is the SEC (O-Level)?
The SEC (O-Level) is the national examination that students take at the end of secondary school from 2027. It replaces the separate GCE O-Level, N(A)-Level and N(T)-Level certificates, and it fits Full Subject-Based Banding (Full SBB), where students take each subject at the level that suits them. It is still jointly awarded by SEAB, MOE and Cambridge.
Instead of an "O-Level certificate" or an "N-Level certificate", every student receives one certificate that lists all their subjects and the level each was taken at.
What stays the same
The standard. SEAB has said there is no change in the overall standard of the examinations under the SEC (O-Level). It remains recognised locally and internationally.
The G3 grades. Subjects taken at G3, the level that matches today's O-Level, are still graded A1 to 9, exactly as parents know them.
What your child learns. The G3 syllabuses carry on from the O-Level ones. Mathematics is now syllabus K310 (formerly 4052), Additional Mathematics is K341 (formerly 4049) and English Language is K300 (formerly 1184).
What changes
1. Subjects are taken at G1, G2 or G3
Each subject sits at one of three levels, and a student can mix them. For example, a student might take English and Mathematics at G3 and another subject at G2. Each level keeps its own grading scale:
G3 (like today's O-Level): A1, A2, B3, B4, C5, C6, D7, E8, 9
G2 (like today's N(A)-Level): grades 1 to 6
G1 (like today's N(T)-Level): grades A to E
When subjects at different levels need to be added together for post-secondary admission, there is an official mapping. For example, A1 to B3 at G3 counts as grade 1 at G2. This mapping is only used for admission scores. It does not change the grades printed on the certificate.
2. The exam calendar shifts
From 2027, the English Language and Mother Tongue written papers are held in September, with the other written papers in October and November. Orals, listening and practical components still come before the written papers, and results are released in January of the following year.
For Sec 4 students, that means English revision needs to peak earlier than many families are used to.
What it means for JC and polytechnic
Junior college: from the 2028 Joint Admissions Exercise, the JC requirement moves from L1R5 of 20 or better to L1R4 of 16 or better, counting five subjects instead of six. The maximum bonus points for JC admission drop from four to three. MOE expects about the same proportion of students to be eligible.
Polytechnic: admission still uses the ELR2B2 aggregate (English, two relevant subjects and two best subjects), with set rules for counting a mix of G2 and G3 subjects.
Polytechnic Foundation Programme (PFP): from 2028, the PFP opens to students taking G3 subjects, or a mix of G2 and G3 subjects.
From 2028, these applications go through one Post-Secondary Admissions Exercise after the January results.
What you can do now
Don't panic about the content. A Sec 3 or Sec 4 student is still learning the same Mathematics, A-Math and English. Good preparation looks the same as it always has.
Treat the Sec 2 subject choice seriously. Whether your child takes a subject at G2 or G3, and whether they take A-Math, shapes their options later. Our guide E-Math or A-Math? How to choose walks through that decision.
Plan around September. With English and Mother Tongue papers moving earlier, map out revision so it does not collide with the other subjects.
Find the gaps early. The students who struggle in Sec 3 are rarely short of effort. Usually a few specific topics from Sec 1 and 2 were never fully secure. The earlier those gaps are found, the easier they are to close.
How we can help
At KnowledgeTrail we have taught at Upper Thomson since 2010, in small groups from Primary 3 to Sec 4 and IP. Our secondary classes already follow the SEC (O-Level) syllabuses:
Sec 1 & 2 Maths, building the foundation for G3 Mathematics
Secondary English, including preparation for the earlier English paper
IP Maths, for students not taking the SEC (O-Level)
Not sure where your child stands? Send us a recent test or exam paper and we will do a free paper analysis, showing which marks were lost to careless slips, which to concepts still forming, and what to work on first. WhatsApp us your child's paper to get started.
Sources: SEAB, Secondary Education Certificate (SEC); MOE, Revised JC admission criteria. Details correct as of October 2026; please check with your child's school for the latest updates.
