If you’re a Secondary student aiming for JC admission, there’s one subject that might give you the biggest edge: Math.

With the new L1R4 scoring system launching in 2028, students will be evaluated based on:

• L1: First language (English or Higher Mother Tongue)
• R4: Four best relevant subjects, including:
  • 1 Math/Science
  • 1 Humanities
  • 1 Math/Science/Humanities
  • 1 Any best subject

What’s changed? Only five subjects now count, not six. This reduces the advantage of being “okay” across many subjects. Now, specialisation wins over balance.

Why Math Is a Game-Changer for JC Admission

Having coached over 500 students over 12 years (with 80% scoring As), one pattern is clear:

Students who focus on scoring A1s in fewer subjects now outperform those with average grades across many.

And Math stands out as one of the smartest subjects to prioritise.

Let’s break it down by comparing the three main academic areas:

Math = 40% of Your L1R4 Score

By scoring A1s in both E Math and A Math, students can lock in 40% of their R4 score. That alone could be the difference between a mid-tier JC and a top-tier JC.

What’s more: Math fits into all R4 combinations, making it the most versatile and strategic anchor subject for JC admission.

The Cost of Waiting

Unfortunately, many students only begin to take Math seriously in Secondary 4, just months before O-Levels.

But by then, it’s often too late to fix gaps built up since Secondary 1, especially in foundational topics like algebra, graphing, and geometry.

We’ve seen students who work hard but get stuck at B3 or B4 — not due to a lack of effort, but because the fundamentals were never solidified early on.

How to Prepare for JC Admission – Year by Year

Secondary 1–2

The best time to build core skills is in algebra. These topics make up over 30% of the O-Level paper. Early mastery creates long-term results.

Secondary 3

Time to refine answering techniques. Learn how to apply formulas to a wide variety of problem types.

Secondary 4

The final sprint. You need high-volume practice, expert feedback, and mock exams to be fully exam-ready.

Final Thoughts: Math Gives You the Edge in JC Admission

The new L1R4 system is an opportunity to get ahead — but only if you prioritize early.

If your child is aiming for JC admission, Math is the smartest subject to double down on. It’s predictable, versatile, and high-scoring.

And the earlier they start, the better the results.

Looking to help your child secure a top JC spot?

Explore Singapore’s only Math specialist program offering weekly guided practice sessions for accelerated mastery.

Start early. Specialise smart. Secure that JC admission.