Same cover price as the bookstore · free SingPost delivery · HBUL Masterclass included
Master POA For Sec 3 & 4 POA · O-Level (G3)

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The same book.
The same price.
Without leaving the house.

The Master POA Study Guide teaches all 12 O-Level topics through one equation, in plain English. It's S$27 in Popular and Kinokuniya and it's S$27 here — same price, and we cover the postage. Order it now and SingPost delivers it to your mailbox in 2 working days, while your child gets the live HBUL Masterclass seat before you close this tab.

No trip to the mall. No empty shelf. Start with the masterclass while the printed book is on its way.

Send me the book — S$27
Mailbox delivery in 2 working daysKeep the book even if you refund
Master POA Study Guide

Same price as the shop

Stocked in Popular and Kinokuniya at S$27. We do not undercut them.

A real book, posted

Delivered by SingPost to your mailbox in 2 working days.

Live class included

Direct purchasers receive the live 2-hour HBUL Masterclass with Caleb as part of Essentials.

Keep it either way

Refund inside 60 days with one email and the book stays yours.

The honest bit first

Why order here if the shop sells it for the same price?

You pay the same S$27 cover price — we deliberately don't undercut the bookstores that stock us.

Two things the till can't give you. The book comes to you — packed the same day and tracked by SingPost, so nobody spends a Saturday at the mall to find the shelf empty. And your child gets immediate access to the live HBUL Masterclass while the printed book is on its way.

Immediate HBUL Masterclass access, plus the chapter quizzes, fourth-edition walkthrough, Double-Entry Diagnostic and Master POA Theory Bot unlocked by the book code, gives the student S$245 of digital study tools in total. The code-gated tools are permanently bound to the first verified student account that redeems the code.

And the book is yours to keep either way. Including if you ask for your money back.

Already bought it in a shop? Activate your full book bonuses here — you don't need to buy it twice.

Sound familiar?

Your child isn't lazy. They're memorising a subject that was built to be worked out.

Revision means re-reading

Notes get copied out again and again, and none of it survives the exam hall.

Every topic is a new rule

Receivables, payables, inventory — twelve separate sets of rules to hold in one head.

Fine in class, blank in the paper

They follow the teacher perfectly, then freeze the moment the question is worded differently.

Effort is not the problem

Hours are going in. The marks are not coming out. That gap is a method problem.

If three of those are true, more past papers won't fix it. Memorising a separate rule for every ledger is the problem, and it has a method fix.

The method

Twelve topics. One equation. That's the whole book.

Receivables, payables, inventory, expenses, non-current assets — students learn each as its own set of rules, then panic when a question mixes them. HBUL is the one equation underneath all of them:

Haveopening balance (b/d)
Buywhat increases it
Usewhat decreases it
Leftclosing balance (c/d)

Change the subject

Any missing figure in any ledger becomes algebra you already know from Maths.

Read the question backwards

Spot which letter each number belongs to, then compute — no guessing which rule applies.

Twelve topics, one habit

The same move works on receivables, inventory, expenses and non-current assets.

HERE'S EXACTLY WHAT YOU'LL MASTER INSIDE THE 264-PAGE STUDY GUIDE...

25-second book preview

See the fourth edition before it arrives.

Play this short preview of the real printed book. The complete guided walkthrough remains a book-code bonus in the student member area.

  • The real printed fourth edition—not a digital mock-up.
  • Cover, binding and inside-page layouts shown at reading distance.
  • No campaign price or dated promotion baked into the video.
Preview spreads from the Master POA Study Guide covering core accounting foundations
  • Pages 1-8 How to Perform Like the Top 1% of POA Students

    The mindset shifts and study strategies that separate A-grade students from the rest—master these fundamentals and watch your confidence soar

  • Pages 115-116 The Fatal Flaw Most Students Make

    Why memorising POA formats is sabotaging your grades and how The LEAP Framework instantly gives you clarity using pattern recognition instead

  • Pages 29-30 The 3-Step Double Entry System That Never Fails

    Build unshakeable foundations with our foolproof method for perfect double entries every single time—no more guessing, no more mistakes

  • Pages 59 & 67 The Accrual Theory Breakthrough

    Finally understand why income isn't money received—this single concept click transforms struggling students into confident ones overnight

Preview spreads from the Master POA Study Guide covering reconciliation and credit transactions
  • Pages 79-85 Bank Reconciliation Mastery

    Know exactly which entries affect profit and which don't, plus the step-by-step system for perfect bank reconciliation every time

  • Pages 64-69 Income Received In Advance Decoded

    Why this trips up 80% of students and how to present it correctly in financial statements using our logical framework

  • Page 90 Credit Purchases vs Credit Sales Transaction Clarity

    Never confuse these commonly mixed-up journal entries again with our side-by-side comparison system

  • Pages 108 & 111 Trade Receivables & Payables Mastery

    Complete breakdown of cash and trade entries with short and sharp, illustrative journal entries — look up once, apply forever

Preview spreads from the Master POA Study Guide covering adjustments and equity
  • Page 122 Impairment Loss Calculations Simplified

    Master the placement of adjusting entries and final figures in financial statements with our special notation system

  • Pages 139-140 Depreciation Method Selection Logic

    Comprehensive comparison showing exactly when to use which method, suitability of methods for different non-current assets based on matching and consistency principles

  • Pages 164 & 171 Drawings & Dividend Transfer Secrets

    The "easy marks" topic that 90% of students mess up—our method makes it automatic

  • Pages 172-173 Share Capital Demystified

    Turn this intimidating topic into your strongest area with our plain-English breakdown

Preview spreads from the Master POA Study Guide covering exam reference material
  • Pages 192-198 Financial Ratio Commentary Formula

    The exact wording structure examiners expect—never lose marks on commentary again

  • Pages 204-205 Account Names Cheat Sheet

    34 accounting terms explained like you're 12 years old—perfect for absolute beginners

  • Pages 207-209 The Ultimate Journal Entry Reference

    64 frequently tested entries that appear in 95% of O/N Level papers—your unfair advantage

  • Pages 218-219 Additional Information Mastery

    Every possible adjustment broken down into small, executable steps for the 20% of marks most students lose

  • Page 222 Scenario-Based Question Formula

    One-page reference to conquer SBQs worth 5-7% of your total grade

AND 264 PAGES OF BREAKTHROUGH INSIGHTS THAT TURN POA CONFUSION INTO A-GRADE CONFIDENCE!

A wide selection of additional Master POA Study Guide page spreads

This isn't another textbook that shows you WHAT to do—it's the only guide that shows you HOW to think through any POA question logically, just like the top 1% of POA students effortlessly do.

The offer

Everything that arrives for S$27.

  • The Master POA Study Guide (printed, 264 pages)

    Ready after checkout: The full HBUL treatment of all 12 O-Level topics, posted to your door at cover price.

    S$27
  • Live HBUL Masterclass seat

    Ready after checkout: Two hours with Caleb, live online via BigMarker, applying the equation across the syllabus.

    S$97
  • Double-Entry Diagnostic Quiz

    Unlocks with the code inside the book: Names your child’s three weakest basics and the order to fix them in.

    S$47
  • Chapter Quiz Bank + login account

    Unlocks with the code inside the book: Self-marking quizzes per chapter so you can see progress, not just effort.

    S$47
  • Master POA Theory Bot (3 months)

    Unlocks with the code inside the book: Answers POA theory questions only, using the terminology in the Master POA Study Guide. It does not solve calculations or mark exam answers.

    S$54
Total valueS$272
You pay todayS$27

Order it if

  • Your child is taking O-Level POA in the next year or two.
  • They are putting in the hours and the grade is not moving.
  • You would rather they understood the subject than memorised it.
  • You want something physical on the desk, not another PDF in a folder.

Skip it if

  • You want an answer key to copy from — this teaches the working.
  • Your child is not sitting POA at all.
  • You are looking for a free download and will not open a paid one either.

Parent & student reviews

What families say...

Screenshot of a parent testimonial

“I got received a few messages from parents asking about POA book. This is the book I bought for my daughter last year when she start do POA at Sec 3. It has help her to understand. Now she at Sec 4 still used this book. So far her result since last year until last WA1 still above 83. Child need to pay attention at class too. Doing homework. Hope this can help your child too.”

Miss Tws, S4 Parent Support Group 2025
Screenshot of a WhatsApp testimonial about the POA guide

“Just wanted to say thanks to Mr. Caleb. R's been using the POA study guide and told me: ‘The tips helped me understand small details better, and the illustrations make it nicer to learn.’ As a parent, that's all I need to hear. A resource that makes revision clearer and more pleasant. Appreciate that.”

Eric Liau HK, Parent of R

“Hi, my name is Garrick and I'm from St. Patrick's Secondary School. The book is extremely useful because it provides me with all the information that I need. This is actually the fourth copy that I purchased for my friends. The book is extremely detailed and everything that you ever needed to find can be found inside. I would definitely recommend Master Principles of Accounts study guide for your revision.”

Garrick, St. Patrick's Secondary School
Caleb Ho teaching Principles of Accounts in a classroom

Who wrote it

Caleb Ho

NTU Accounting graduate, 16+ years coaching POA, and the author of the Master POA Study Guide. He built HBUL because he was tired of watching capable students fail a subject they'd only ever been asked to memorise. Over 1,000 students and 875+ reviews later, it's the same method in the book, in the masterclass, and in every class he teaches.

1000+students coached
875+reviews
16 yrsteaching POA

The Night I Almost Dropped Out Of Accounting Changed Everything—For Me And 14,000+ Students

This Is Something Completely New. Completely Different. Completely Unlike Anything Your Teachers Have Ever Shown You - Read The Story Below To Discover The LEAP Framework...

Hi, I'm Caleb and I've been transforming POA results for Singapore students for the past 18 years.

But it almost never happened.

There I was, sitting in my study room at 2 AM, staring at another failed accounting assignment. Red ink covered every page. The concepts made no sense. The formulas felt like a foreign language.

I remember thinking: "Maybe I'm just not cut out for this."

That night, I seriously considered dropping out of my accounting degree. The shame was overwhelming. How could I face my parents? My friends? Everyone expected me to succeed, and here I was, failing at the very subject I was supposed to master.

But something stopped me from walking away.

Maybe it was stubbornness. Maybe it was desperation. But I decided to figure out what I was missing—not just to pass, but to actually understand.

That decision changed everything.

When I started teaching in 2007 as a private home tutor, my first POA student didn't just pass—she topped her entire cohort and later became an auditor with the Big 4.

Caleb with Rachel, his first POA student
With Rachel, my very first POA student

Then something remarkable started happening. Students began referring their struggling friends. Teachers started asking about my methods. Parents drove across Singapore to get their kids into my classes.

The breakthrough came when I realized most POA teaching focuses on WHAT to do, but never explains WHY you're doing it or HOW to think through problems logically.

Students were memorising formats instead of understanding patterns. They were practising random questions instead of building systematic thinking.

As word spread, my classes grew from 8 students to 60+ students. Media outlets began featuring my views on financial literacy and accounting education. Other tutors started asking me to train them.

A collection of media mentions featuring Caleb's accounting education work
Media Mentions

Over 18 years, I've personally guided more than 1,000 students through POA mastery. But I knew I could help more.

That's when I created the Master POA Study Guide—my teaching method in written form. This guide feels like Caleb in written form.

And that's exactly what it is. When you can't be in my classroom, this guide becomes your personal tutor. Every explanation, every framework, every "aha moment" I've refined over 10,000+ teaching hours—it's all there.

Several editions of the Master POA Study Guide displayed together
Master POA Study Guide Over The Years

The guide has now evolved through 4 complete editions, with each version refined by real student feedback and results. To date, over 14,000 students have used this method to transform their POA results.

The method works because it's based on one breakthrough insight: POA isn't about memorisation—it's about pattern recognition.

Once students see the patterns, everything clicks. The subject that seemed impossible becomes logical. The confidence that seemed impossible becomes inevitable.

I could have kept this method exclusive to the students I coach. I could have continued charging high fees for small groups only. But I remember what it felt like that night in my study room. The frustration. The confusion. The feeling that maybe I just wasn't cut out for this subject.

If you're feeling that way about POA right now, I want you to know: it's not you. It's the method you've been taught.

The same struggle that almost made me quit became the foundation for helping 14,000+ students succeed. That night of despair? It led to 18 years of proven results.

The chance to change the way you learn is here. Let's make the transformation yours.

Send me the book — S$27

Before you order

Questions parents ask.

Yes — the same printed Master POA Study Guide stocked in Popular and Kinokuniya at S$27. Not an ebook, not an abridged edition. We post you a physical copy.

Last call

One book. One equation. One live class with the author.

Next term starts whether the method clicks or not. Cover price, posted to your door, with S$245 of digital study tools including the masterclass — and the right to change your mind and keep the book anyway.

Send me the book — S$27 Tracked SingPost · free delivery · mailbox delivery in 2 working days · 60-day keep-the-book guarantee