Full SBB Explained: What G1, G2, and G3 Math Mean for Your Child

If your child is heading into secondary school, or already in one, you have probably heard the terms G1, G2, and G3 being thrown around. Many parents are understandably confused. For years, the Express, Normal Academic, and Normal Technical streams were the benchmarks every family used to understand where their child stood academically. Now, Singapore has changed all of that.

The shift to Full Subject-Based Banding (FSBB) is the biggest restructuring of secondary education in decades, and it changes what is possible for your child far more than most parents realise. In this guide, we break down exactly what the new system means, why the old mindset about “lower streams” no longer applies, and what you can do right now to make sure your child makes the most of this opportunity.

What Is Full Subject-Based Banding (FSBB)?

According to MOE’s official guidance, FSBB has been rolled out across all secondary schools from 2024. Under this system, the old stream labels have been replaced with three subject levels:

• G3 (roughly equivalent to the old Express stream, sitting O-Level standard papers)
• G2 (roughly equivalent to the old Normal Academic stream, sitting a mixed credential)
• G1 (roughly equivalent to the old Normal Technical stream, sitting a foundation credential)

The critical difference from the old system is that these levels apply per subject, not to the whole student. Your child might take Mathematics at G3 while taking English at G2. This means a student is no longer boxed into one stream for everything.

For a complete overview, MOE’s FSBB page explains the national framework in detail.

What Do G1, G2, and G3 Actually Mean for Your Child?

Here is a quick breakdown of how national examinations work under FSBB:

• G3 students sit the Singapore-Cambridge O-Level examinations, the same standard as the old Express stream.
• G2 students sit a mixed credential that combines O-Level and N-Level components, but crucially, they can take individual subjects at G3 level and earn full O-Level certificates for those subjects.
• G1 students sit a foundation-level credential.

That second point is what makes this system genuinely exciting for parents of G2 students. A child placed at G2 overall can still qualify to sit Mathematics at G3, and if they pass, they walk away with a full O-Level Mathematics certificate. The ceiling has been raised, not lowered.

The Biggest Myth Parents Need to Drop

For years, being placed in Normal Academic or Normal Technical meant one thing to most families: a harder path to university and a lower ceiling overall. That mindset made sense when streams were rigid. It no longer applies.

Under FSBB, the pathway from G2 to G3 subjects is a real, accessible route, not a rare exception. Schools assess students regularly, and those who perform well in G2 classes can be offered the chance to take subjects at G3 level. Students who were borderline at PSLE, perhaps scoring an AL5 or AL6, are not locked out of O-Level results.

The danger now is not the system. It is low expectations. When a student believes the ceiling is fixed, they stop reaching for it. As a parent, one of the most powerful things you can do is refuse to let that belief take hold.

Case Studies: Students Who Did Not Excel at PSLE But Broke Through in Secondary School

At Jimmy Maths, we have seen this play out with our own students time and again. Here are four examples that stay with us.

Case Study 1: Saki (Normal Academic to Express Math Transfer)

• Joined us in the Normal Academic Math stream
• Scored 24 out of 25 in her weighted assessment after enrolling
• Transferred to Express Math from Term 3 of the same year, moving up a full stream on results alone

How we helped:

• Focused on conceptual clarity so she could handle harder problem types
• Built her confidence to attempt Express-level questions
• Ensured she did not just pass, she dominated her assessments

Case Study 2: Eda (AL6 Average to A1 in Math WA and Australian Math Competition)

• Was averaging around AL6 before enrolling
• Achieved A1 in her Math weighted assessment within months
• Selected by her school to represent them in the Australian Mathematics Competition 2025
• Her mother Yvonne left a five-star Google Review crediting the structured lessons and patient teaching approach

How we helped:

• Delivered well-structured and engaging lessons that built real understanding
• Provided patient, knowledgeable tutors committed to student success
• Rebuilt her confidence alongside her academic performance

Case Study 3: Valerie (Grade C in P6 Math to B3 to A1 in Sec 1)

• Struggled with Math throughout Primary 6, consistently at Grade C
• Made a B3 to A1 jump in Secondary 1 Math
• Said her teacher “makes Math look so simple” and gradually came to love the subject
• Her parent credited Teacher Jimmy specifically for his patient, concept-focused approach

How we helped:

• Identified gaps from primary school and filled them systematically
• Used patient explanation of concepts she had never fully grasped before
• Changed her relationship with Math from dread to enjoyment

Case Study 4: Denise (F9 in Sec 1 to A2 at O-Levels)

• Joined us in Secondary 1 with an F9 in Math
• Graduated with an A2 at O-Level, a complete academic transformation
• Her parent credited the patience and consistent support she received over four years

How we helped:

• Made a long-term commitment to rebuilding her fundamentals from scratch
• Provided consistent encouragement through the difficult early stages
• Sustained her motivation across four years all the way to the O-Level finish line

The Common Thread: What These Students Share

None of them had an impressive PSLE result. All of them had the right environment, the right expectations, and the right support. Being placed in a high-standard class pushed them to perform at a higher level than anyone expected, and the G1/G2/G3 system creates exactly that same opportunity for your child today, if they are willing to seize it.

What Parents Should Do Now

If your child has just entered secondary school or is in their first two years, here are the steps worth taking immediately.

Find out which subjects your child qualifies to take at G3 level. Ask their form teacher or subject teacher directly. Many parents do not know this option exists, and some students miss the window to be considered simply because no one raised it.

Do not let your child settle for a G2 mindset. Even if they are taking most subjects at G2, encourage them to approach each subject as if G3 is within reach. In many cases, it is.

Enrol them in tuition that teaches to the G3 standard. A programme that tailors content down to a lower level may feel more comfortable in the short term, but it does not prepare your child for the assessments that determine subject-level promotion.

Start early. The gap between G2 and G3 content is closeable, but it requires consistent effort over time. Students who begin addressing their foundation gaps in Secondary 1 are in a far stronger position by the time O-Levels arrive.

If your child is working toward their A-Math qualification, our A-Math tuition page has more details on how we structure our secondary school programmes.

The Stream Does Not Define the Student

FSBB is Singapore MOE’s clearest signal yet that every student deserves a genuine shot at reaching higher, regardless of where they land at PSLE. The old ceiling has been lifted. The question is whether your child has the support and the belief to take advantage of it.

At Jimmy Maths, we have always believed that a lower PSLE score is a starting point, not a verdict. Our philosophy is to teach every student to the G3 (O-Level) standard with no watered-down content, because we genuinely believe G2 students are capable of G3 work with the right support. Students get unlimited WhatsApp access to their tutors between lessons, unlimited marking so gaps are caught early, and personalised practice through our Adaptably AI platform. The students we are most proud of are often the ones no one expected much from.

If your child is in G2 and has their sights set on G3 subjects, find out how our secondary school Math tuition can help, and get in touch with us today to get started.