SECONDARY 2 G3 MATHEMATICS

Develop advanced reasoning with strong conceptual depth.

Secondary 2 G3 stream focuses on algebraic fluency, logical reasoning, and confidence with non-routine problems. Secondary 2 is a consolidation year where gaps from Sec 1 compound and students must solidify foundations before Upper Secondary. These students will sit the Singapore-Cambridge SEC exam — a single national exam that replaces all three former secondary leaving exams (O-Level, N(A)-Level, N(T)-Level).
Try the Practice Demo

Syllabus

What we cover

Chapters14
Sub-topics54

DeepThink aligns to MOE Lower Secondary expectations while adapting pacing and scaffolding for this stream. Students are challenged with deeper extensions while ensuring prerequisite fundamentals remain secure.

Chapter 1Linear Graphs and Simultaneous Linear Equations

  • Equations of straight lines
  • Graphs of linear equations in the form ax + by = c
  • Solving simultaneous linear equations using graphical method
  • Solving simultaneous linear equations using algebraic methods
  • Applications of simultaneous linear equations in real-world contexts

Chapter 2Linear Inequalities

  • Simple inequalities
  • Solving simple linear inequalities
  • Solving problems involving linear inequalities

Chapter 3Expansion and Factorisation of Algebraic Expressions

  • Addition and subtraction of quadratic expressions
  • Expansion of algebraic expressions in the form (a + b)(c + d)
  • Expansion of quadratic expressions
  • Factorisation of quadratic expressions
  • Factorisation of algebraic expressions into the form (a + b)(c + d)

Chapter 4Expansion and Factorisation Using Special Algebraic Identities

  • Expansion using special algebraic identities
  • Factorisation using special algebraic identities

Chapter 5Quadratic Equations and Graphs

  • Solving quadratic equations by factorisation
  • Quadratic functions and graphs

Chapter 6Algebraic Fractions and Formulae

  • Algebraic fractions
  • Multiplication and division of algebraic fractions
  • Addition and subtraction of algebraic fractions
  • Solving equations involving algebraic fractions
  • Manipulation of algebraic formulae

Chapter 7Direct and Inverse Proportions

  • Direct proportion
  • Algebraic and graphical representations of direct proportion
  • Other forms of direct proportion
  • Inverse proportion
  • Algebraic and graphical representations of inverse proportion
  • Other forms of inverse proportion

Chapter 8Congruence and Similarity

  • Congruent figures
  • Similar figures
  • Similarity and enlargement

Chapter 9Pythagoras' Theorem

  • Pythagoras' Theorem
  • Applications of Pythagoras' Theorem in real-world contexts
  • Converse of Pythagoras' Theorem

Chapter 10Trigonometric Ratios

  • Trigonometric ratios
  • Applications of trigonometric ratios to find unknown sides of right-angled triangles
  • Applications of trigonometric ratios to find unknown angles in right-angled triangles
  • Applications of trigonometric ratios in real-world contexts

Chapter 11Volume and Surface Area of Pyramids, Cones and Spheres

  • Volume and surface area of pyramids
  • Volume and surface area of cones
  • Volume and surface area of spheres
  • Volume and surface area of composite solids

Chapter 12Probability of Single Events

  • Probability experiment and sample space
  • Probability of single events
  • Further examples of probability of single events
  • Experimental approach to finding probability

Chapter 13Statistical Diagrams

  • Dot diagrams
  • Histograms for ungrouped data
  • Stem-and-leaf diagrams
  • Histograms for grouped data

Chapter 14Averages of Statistical Data

  • Mean
  • Median
  • Mode
  • Measures of central tendency
Note

Lower Secondary G3 should balance rigor with clarity, so students can scale into Upper Secondary without conceptual gaps.

Common challenges at this level

Secondary 2 students in the G3 stream often face:

Gaps from Sec 1 compounding quietly

Topics introduced in Sec 1 are now assumed knowledge. Students who moved on without fully understanding algebra, ratios, or equation-solving find that these gaps make every new topic harder.

Adapting to higher cognitive demand

Questions become more abstract and less procedural, requiring stronger reasoning and method selection.

Applying concepts in unfamiliar contexts

Students may understand procedures but struggle when problems are presented in unfamiliar multi-step formats.

Managing consistency across subjects

With more subjects and deadlines, students can lose momentum without focused, guided practice.

How DeepThink helps Sec 2 G3 students

DeepThink supports Secondary 2 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.

Close Sec 1 gaps before they widen

Diagnostics identify exactly which Sec 1 foundations are shaky, and we reinforce them alongside current topics so students enter Upper Secondary on solid ground.

Concept-first teaching with strategic challenge

We emphasise why methods work, then build fluency through targeted, progressively harder practice.

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 enter exam years with both conceptual confidence and technical fluency.

Program facts

What families should know about Secondary 2 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 2 G3 students who need weekly support matched to their exact stream and exam syllabus.

Decision support

When Secondary 2 G3 support is the right fit

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

Your child is considering A-Math for Upper Secondary

A-Math requires strong algebraic fluency that must be built in Lower Secondary. If your child is planning to take A-Math, Sec 2 is the year to ensure these foundations are rock-solid.

Sec 2 topics feel harder than Sec 1

The Sec 2 G3 jump — quadratic equations, trigonometry, geometric proofs — is real and catches many students by surprise. Early support prevents a mid-year slump.

Your child understands concepts but makes careless errors

Persistent "careless" errors usually indicate incomplete procedural fluency, not inattention. Structured practice that builds automaticity with core skills resolves this pattern.

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 2 G3 Math cover?

Sec 2 G3 covers advanced algebraic manipulation, quadratic equations, simultaneous equations, coordinate geometry, trigonometry, geometric proofs, probability, and statistical analysis — at a pace that prepares students for both E-Math and A-Math.

Should my Sec 2 G3 child start thinking about A-Math?

Yes. Sec 2 G3 builds the algebraic fluency that A-Math demands. Students considering A-Math should ensure their algebra, equation-solving, and graph interpretation are secure by the end of Sec 2.

How important are Sec 2 G3 foundations for exam performance?

Very important. Nearly every Sec 3-4 topic extends Sec 2 concepts. Students who enter Upper Secondary with strong Sec 2 foundations spend less time relearning and more time mastering exam-level application.

Is Sec 2 G3 harder than Sec 1 G3?

The content is more demanding — topics like quadratic equations, trigonometry, and geometric proofs require higher-level reasoning. Students who were comfortable in Sec 1 sometimes find the Sec 2 jump surprising.

My child is in G3 but seems to be struggling — should they move to G2?

Not necessarily. Many Sec 2 G3 students hit a temporary difficulty wall when topics become more abstract. Targeted support to close specific gaps often resolves the issue without requiring a stream change.

How does the new SEC exam affect my Sec 2 G3 child?

Current Sec 2 G3 students will sit the Singapore-Cambridge SEC in Sec 4 — a single national exam replacing all three former leaving exams. G3 Math aligns to the former O-Level standard. The content and skills required remain the same — strong Sec 2 G3 foundations are the best preparation.

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.

Ready to start?

Try a free trial class and see how DeepThink works

Experience our teaching approach firsthand. No commitment required.

Free trial • No credit card required

Try the Practice Demo

Secondary Schools offering G3 / IP

All Zones
North
South
East
West