SECONDARY 3 G3 MATHEMATICS

Excel in O-Level E-Math and A-Math with strategic rigor.

Secondary 3 G3 stream focuses on integrating algebra, trigonometry, and higher-order techniques for exam performance. Secondary 3 marks a sharp content jump as the Upper Secondary syllabus introduces more demanding topics and preparation for the SEC exam begins. Current Sec 3 students are the first cohort sitting the Singapore-Cambridge SEC in 2027 — a single national exam replacing all three former leaving exams (O-Level, N(A)-Level, N(T)-Level).
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Syllabus

What we cover

Chapters11
Sub-topics42

DeepThink aligns to Upper Secondary outcomes and exam requirements while reinforcing essential prerequisites. Preparation emphasises precise working, topic integration, and exam execution across E-Math and A-Math demands.

Chapter 1Quadratic and Fractional Equations

  • Solving quadratic equations by completing the square
  • Solving quadratic equations using formula
  • Solving fractional equations reducible to quadratic equations
  • Solving quadratic equations by graphical method
  • Sketching graphs of quadratic functions
  • Applications of quadratic equations and functions in real-world contexts

Chapter 2Simultaneous Linear Inequalities

  • Solving simultaneous linear inequalities
  • Solving problems involving simultaneous linear inequalities

Chapter 3Indices and Standard Form

  • Indices
  • Laws of indices
  • Zero and negative indices
  • Rational indices
  • Compound interest
  • Standard form

Chapter 4Coordinate Geometry

  • Length of a line segment
  • Gradient of a straight line
  • Equation of a straight line

Chapter 5Graphs of Functions and Graphical Solution

  • Graphs of cubic functions
  • Graphs of reciprocal functions
  • Graphs of exponential functions
  • Gradient of a curve
  • Applications of graphs in real-world contexts

Chapter 6Further Trigonometry

  • Sine and cosine of obtuse angles
  • Area of triangle
  • Sine Rule
  • Cosine Rule

Chapter 7Applications of Trigonometry

  • Angles of elevation and depression
  • Bearings
  • Three-dimensional problems

Chapter 8Arc Length, Sector Area and Radian Measure

  • Length of arc
  • Area of sector
  • Radian measure
  • Arc length and sector area using radian measure

Chapter 9Congruence and Similarity Tests

  • Bisectors and scale drawings
  • Congruence tests
  • Similarity tests
  • Applications of congruent and similar triangles

Chapter 10Area and Volume of Similar Figures and Solids

  • Area of similar figures
  • Volume of similar solids
  • Solving problems involving similar solids

Chapter 11Geometrical Properties of Circles

  • Symmetric properties of circles
  • Angle properties of circles
Note

Upper Secondary G3 success comes from rigorous concept mastery plus disciplined exam execution.

Common challenges at this level

Secondary 3 students in the G3 stream often face:

Managing the Upper Secondary content jump

The syllabus expands significantly in Sec 3, with new topics like trigonometry, advanced algebra, and (for some streams) early calculus. Students who were comfortable before may suddenly feel stretched.

Handling complex mixed-topic papers

Students may know individual topics but still struggle when papers integrate many concepts under time pressure.

Handling mixed-topic exam questions

Exam questions combine multiple concepts, so students need both technical fluency and strategic planning.

Balancing Math with full exam-year workload

Revision competes with many subjects; without clear prioritisation, important Math topics are often under-practised.

How DeepThink helps Sec 3 G3 students

DeepThink supports Secondary 3 students in the G3 stream through targeted diagnostics, structured teaching, and strategic practice:

Diagnose and close gaps quickly

Our platform identifies chapter-level weaknesses early so students focus effort where it matters most.

Build momentum through the content jump

We front-load the hardest new concepts with structured teaching and targeted practice, so students keep pace instead of falling behind as complexity increases.

Rigorous practice loops and error analysis

DeepThink uses targeted diagnostics, correction workflows, and strategic teaching to lift consistency in exam conditions.

Track progress with clear next steps

Students and parents see what is secure, what needs reinforcement, and which topics should be prioritised next.

With consistent support, students can approach O-Level papers with precision, confidence, and exam-ready stamina.

Program facts

What families should know about Secondary 3 G3 support

The details parents usually want before deciding whether to book a trial.

Lesson format

Weekly 1.5-hour live online class

Targeted online practice with instant marking supports work between lessons.

Class size

Maximum 4 students

Students are grouped by learning pace, not just by level — if no existing session matches your child’s pace, we open a new one.

Syllabus focus

MOE Secondary Mathematics

Full curriculum and chapter list shown in the syllabus section above.

Pricing

$50 per live class

Same fee across levels and streams.

Trial

Free trial class available

Parents can see the teaching pace, structure, and student experience before committing.

Best fit

Secondary 3 G3 students who need weekly support matched to their exact stream and exam syllabus.

Decision support

When Secondary 3 G3 support is the right fit

These are the situations where extra support tends to make the biggest difference.

Your child has started A-Math and is finding it very different from E-Math

A-Math requires a different mode of thinking — abstract manipulation, formal proofs, and unfamiliar techniques. Many G3 students need separate support for A-Math even if E-Math is manageable.

The volume of new Sec 3 content is overwhelming

Sec 3 G3 introduces more new topics than any other year. Falling behind on even one chapter creates a cascading effect because later topics build on earlier ones.

Your child wants to enter JC and needs strong O-Level results

JC admission depends heavily on O-Level grades. Building strong topic mastery in Sec 3 frees up Sec 4 for exam practice and fine-tuning rather than learning from scratch.

If any of these patterns sound familiar, this is likely the right level of support for your child — a trial class is a good next step.

Frequently asked questions

Clear answers for parents

What does Sec 3 G3 Math cover?

Sec 3 G3 covers advanced algebra (including polynomials and partial fractions), trigonometric identities and equations, coordinate geometry, logarithms and indices, and introduction to calculus for A-Math students.

Should my Sec 3 G3 child take both E-Math and A-Math?

Most G3 students take both. E-Math covers the core syllabus while A-Math adds calculus, trigonometry, and advanced algebra. Taking both broadens JC and polytechnic options significantly.

How do E-Math and A-Math differ in Sec 3?

E-Math focuses on applied problem-solving across a broad syllabus. A-Math introduces more abstract concepts — differentiation, trigonometric proofs, and algebraic manipulation — that require deeper reasoning and fluency.

Is Sec 3 the hardest year for G3 Math?

Many students find Sec 3 the most challenging because the volume of new, demanding content is at its peak. Sec 4 focuses more on revision and exam technique, which feels more manageable once the concepts are understood.

My child's A-Math is much weaker than E-Math — what should we do?

This is common. A-Math requires different skills — algebraic manipulation, proof techniques, and abstract reasoning. Targeted A-Math support in Sec 3 is critical because the Sec 4 revision window is too short to learn from scratch.

Will my Sec 3 G3 child sit the SEC exam or O-Levels?

Current Sec 3 students are the first cohort sitting the Singapore-Cambridge SEC in 2027 — a single national exam replacing all three former leaving exams (O-Level, N(A)-Level, N(T)-Level). G3 Math aligns to the former O-Level standard. E-Math and A-Math subject options continue under the SEC framework, and students can mix G-levels across subjects.

How many students are in each class?

Four, at most. Students are grouped by learning pace, not just by year level, so each lesson moves at the speed of the students actually in it. When no session matches a child’s pace, we open a new one. In a class that size, every child answers questions, gets their working checked, and gets help the moment they need it.

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