Crash Course · Primary 6 · PSLE Math

PSLE Math Intensive, the Lock & Key crash course

In PSLE Math, the slow part isn't the sum. It's reading a question and not being sure which method to reach for. We fix that, one question type at a time.

A focused 2-day crash course that trains the Lock & Key method across all 10 most-tested PSLE question types, with 158 curated past-paper questions. The June 2026 camp has run, and you can still enrol for the full recorded lessons, printed booklets and practice videos on our LMS, right up to the PSLE paper.

Enrol for the recordings + materials Ask us on WhatsApp →

10 hours of teaching, recorded 158 curated questions Onsite or Zoom

Video: inside GPA's PSLE Math Intensive camp

Watch: inside the camp

158

curated questions

question types

days, recorded

Built from 20 years of PSLE papers

10 question types158 curated questions10h of teaching

See free worked solutions →

A GPA Principal Tutor teaching the Lock and Key method to a small PSLE class

The framework

PSLE Math isn't one subject. It's a set of recurring structures.

Most questions look different on the surface. Underneath, they test a structure your child has seen before.

The biggest time-waster in the paper is not calculation. It is reading a question and not being sure which method to use, then trying a few steps, second-guessing, and starting again. Lock & Key trains the reflex that removes that hesitation.

1 · Lock

Spot the question's underlying structure.

2 · Key

Pick the method that fits that structure.

3 · Solve

Work it cleanly, with marks-visible steps.

The locks

The 10 PSLE Math question types we train.

Identified from two decades of PSLE papers. Across the fourteen years we counted closely, 2012 to 2025, three of these ten, Geometry, Area & Perimeter and Volume & Rate, appeared in every single Paper 2. The 158 curated questions are spread across all ten types, so your child gets repeated, deliberate practice on each. See the full most-tested analysis, or the free preview of two types with worked solutions.

Part-Whole & Comparison · units, remainders and equal parts in fractions, ratio and money.

Gaps & Differences · quantity-and-value, excess-and-shortage, supposition.

Before, Change, After · constant part, constant total, constant difference.

Proportion · direct proportion, sharing, least-number and packing.

Volume & Rate · tank filling and draining, taps, water levels, rate.

Percentage · discount, GST, interest, increase, decrease and reverse percentage.

Data Handling · bar graphs with hidden scales, pie charts, line graphs, average.

Area & Perimeter · composite figures, circles, overlaps, folding and cutting.

Geometry · angle-chasing, parallel lines, isosceles and equilateral, reflection.

T10

Number Patterns · linear and figural patterns, common terms, pattern to formula.

Explore the 10 question types in the PSLE Hub →

Try a few of the 158

The kind of question we make ordinary.

Real PSLE questions from the Intensive booklet. Have a go, then open the method. This is the reflex the two days build.

Type 3 · Before, Change, After2024 PSLE

Alan and Barry shared a box of stickers in the ratio 3 : 2. Alan gave 20% of his stickers to Clara, who had none at first. Barry then gave Clara some too, so that in total 26% of the box went to Clara. What fraction of Barry's stickers did he give away?

Reveal the method & answer

The lock: constant total. Scale the box to 100 units, so Alan 60 and Barry 40.

The key: Alan gives 20% of 60 = 12 units. Clara ends with 26 units, so Barry gave 26 less 12 = 14 units.

Answer: 14/40 = 7/20 of Barry's stickers.

Type 6 · Percentage2025 PSLE

A jacket is on sale at 15% off. Rahim paid $57.80 for it. A week later Simon bought the same jacket at a different discount, and the amounts they paid differed by $6.80. What two discounts could Simon have received?

Reveal the method & answer

The lock: percentage, work from the part back to the whole.

The key: 85% = $57.80, so the usual price is $68. Simon paid $64.60 or $51.00, two cases.

Answer: a discount of 5% or 25%.

Type 5 · Volume & Rate2021 PSLE

An empty tank measures 55 cm by 30 cm by 20 cm. At 2pm tap A fills it at 4.2 litres a minute. Five minutes later tap B starts draining. At 2.15pm the tank is exactly half full. How much does tap B drain per minute?

Reveal the method & answer

The lock: volume and rate, track water in minus water out.

The key: half the tank is 16.5 litres. In 15 minutes tap A adds 63 litres; tap B ran 10 minutes and removed 63 less 16.5 = 46.5 litres.

Answer: 4.65 litres per minute.

These are 3 of the 158 curated questions across the 10 types. The free preview includes two full question types with complete worked solutions.

The method in action

Don't take "we explain it well" on trust.

Video: a GPA teacher solving a real PSLE question with the Lock and Key method

A real PSLE question, solved

Every PSLE Paper 2 question has a free worked solution and video. Browse them all, no sign-up →

What the two days train

Three habits that hold under exam pressure.

Not just more practice. The Intensive rebuilds how your child approaches a question, so they work purposefully, not hopefully.

Question-type recognition

Scan a question and know what it is testing, the common trap, and the method that fits.

From "let me try a few things" to "I know exactly what this is."

Methods that don't collapse

Structured, repeatable, PSLE-safe methods that hold even when a child is tired. Many students know the concept but mix methods or skip steps under exam conditions.

Practice that builds accuracy

Repeated exposure to the same types, faster recognition each attempt, cleaner working, fewer avoidable mistakes. 158 curated questions across the 10 types.

Who it suits

It works at both ends of the class.

The Intensive is a good fit if your child:

takes too long deciding which method to use;
freezes on an unfamiliar-looking question;
is almost right but loses presentation or method marks;
understands the concepts but slips on careless errors;
needs a stronger approach without drowning in assessment books.

Already doing well

Sharpens decision-time and clean presentation, where the last marks usually go.

Inconsistent

Gives a reliable structure, so a hard-looking question stops feeling random.

Capable but messy

Builds marks-visible working that earns method marks and catches slips.

What's included

Stack the value before the price.

10 hours of teaching, recorded (the two June days, 10am to 3pm), to rewatch any time.
Physical question & answer booklets with fully worked solutions, written in-house.
5 lesson recordings + 84 extra practice videos across the 10 question types.
Digital marking on four things: method, presentation, accuracy and exam habits.
LMS access until 1 day after the PSLE Math paper, so it stays a revision resource to the exam.

A GPA Principal Tutor guiding a Primary 6 student through a worked solution

A keepable resource

In a digital-everything market, we still print the booklets.

The questions and worked solutions come as physical books your child can write in, flag, and revise from without a screen. They are part of the curriculum we write and publish ourselves, 60+ textbooks and 40+ workbooks, refined over eight years of classroom use.

Schedule, format & fees

Three branches or Zoom, the same content.

Day 1

completed

Thu 4 June 2026 · 10:00am to 3:00pm

Day 2

completed

Fri 5 June 2026 · 10:00am to 3:00pm

Venues

Bukit Timah (Coronation Plaza) · Punggol · Pasir Ris · or live on Zoom. The same teaching and materials at every venue.

	Recordings + materials	PSLE Bundle
Live June teaching	Has run (recordings included)	Intensive included
Booklets, recordings, 84 videos, marking	Yes	Yes
Adds Mock Exams + TYS walkthrough	No	Yes
Saving	None on the individual course	10% bundle saving

Available now

Recordings + materials package, on the LMS

$480

all-inclusive · no separate discount on the individual course

5 lesson recordings + 84 practice videos
Both printed booklets, posted to you
Digital marking with feedback
LMS access until just after the PSLE paper

Enrol for the recordings package

Financial assistance is available case-by-case for families with genuine need.

Video: Mrs Loh, a GPA parent, shares her daughter's experience

A parent's story, on camera

AL5AL1

"When my daughter got AL5 in P6 SA1, I was desperate. Mrs Eileen even asked to see her paper first. Two months later she hit AL3 at Prelims, and eventually AL1 at PSLE."

Hong, parent of a P6 student

Based on GPA's internal tracking and what families have shared with us; individual results vary with each student's starting point and effort. More on our results page.

Taught by

The teachers who wrote the method.

Mrs Eileen Toh

Founder & Curriculum Architect

Former MOE teacher, M.Ed (NIE). She wrote the Lock & Key curriculum the Intensive is built on.

Ms JS Lee

Principal Tutor · Head of Primary Math

B.Sc. (Hons), 6+ years teaching under Mrs Toh. Known for calm, step-by-step explanations.

Questions parents ask

The June dates have passed. Can my child still join?

Yes. The live days ran on 4 and 5 June, but enrolment is open and you get the full package on our LMS: all 5 lesson recordings, both printed booklets, the 84 practice videos and digital marking, available until just after the PSLE Math paper. Your child follows the same Lock & Key method at their own pace.

Is there a discount now that it is recordings only?

The individual crash course stays at $480, with everything included. We do not run a separate discount on it. If you want a saving, the PSLE Bundle pairs the Intensive with Mock Exams and the Ten-Year-Series walkthrough at a built-in 10% off.

What actually is the Lock & Key method?

Most PSLE questions look different but test a familiar structure underneath. The structure is the lock, the matching method is the key. We train your child to spot the lock quickly, reach for the right key, and solve cleanly, instead of trying a few things and second-guessing.

Who teaches it?

Our Principal Tutors, Mrs Eileen Toh and Ms JS Lee. They are the teachers who write and refine the curriculum, so your child learns the method from the people who built it.

How does the marking work?

Your child submits selected answers digitally and gets feedback on four things: method, presentation, accuracy and exam habits. It is about how to present working that earns full marks, not only reaching the right number.

My child is already a GPA student. Do we need to enrol?

Probably not. Weekly Primary 6 and PSLE Last Lap students attend the Intensive as part of their existing programme, at no extra fee. Check with us first and we will confirm which one your child is in.

PSLE Math Intensive, the Lock & Key crash course

PSLE Math isn't one subject. It's a set of recurring structures.

The 10 PSLE Math question types we train.

The kind of question we make ordinary.

Don't take "we explain it well" on trust.