Master O-Level Chemistry — and actually love it

A complete Combined Science Chemistry course mapped lesson-by-lesson to the MOE GCE O-Level / G3 syllabus — taught in sharp 30-minute sessions that connect every concept to the real world, so Secondary 3 and 4 students walk into the exam hall feeling genuinely ready.

110 lessonsAI-adaptiveCancel anytimeLearn anywhere

"My job isn't to get you through the exam — it's to make the chemistry so clear that the exam takes care of itself."

— Tuition on Demand Academy

What you'll learn

What you'll be able to do

Recall and apply all core Combined Science Chemistry topics — atomic structure, bonding, the Periodic Table, acids and bases, redox, organic chemistry through carboxylic acids, and more — confidently and accurately.
Interpret and construct chemical equations, including ionic equations and state symbols, with full understanding of what each symbol represents.
Link every major concept to a real-world application — from rusting bridges and fertiliser production to the fuels in a car engine and the chemistry of cleaning products.
Tackle structured and free-response exam questions using proven techniques, having practised with topic quizzes, cumulative reviews, and full timed mock papers modelled on actual O-Level past papers.
Demonstrate safe and logical laboratory thinking — describe, explain, and evaluate experimental methods and results as required by the practical assessment component.
Build consistent, independent study habits by working through a clearly mapped two-year schedule of 30-minute lessons that fit around school, CCAs, and family life.

How it works

A school that adapts to you

This isn't a set of static videos. Every lesson is generated live and tuned to where you actually are.

We learn your level

A quick placement check tailors your starting point so you're never bored or lost.

Lessons adapt as you go

Each lesson is written for your pace and your goal, adjusting as your skills grow.

Your AI coach keeps you moving

Checkpoints, feedback, and gentle nudges turn progress into a real result.

The curriculum

What's inside your school

13 modules · 110 lessons

The Building Blocks: Atomic Structure & The Periodic Table

Establishes the foundational model of the atom, subatomic particles, electronic configuration, and how the Periodic Table is organised — the bedrock for every topic that follows.

1.1Welcome to Chemistry — Why It's Everywhere!Included
1.2Inside the Atom: Protons, Neutrons & ElectronsIncluded
1.3Atomic Number, Mass Number & IsotopesIncluded
1.4Isotopes in the Real WorldIncluded
1.5Electronic Configuration: Filling the ShellsIncluded
1.6Electronic Configuration Practice & Quick QuizIncluded
1.7Introducing the Periodic TableIncluded
1.8Trends Across Periods & Down GroupsIncluded
1.9Group I — The Alkali MetalsIncluded
1.10Group VII — The HalogensIncluded

Holding It Together: Chemical Bonding & Structure

Covers ionic, covalent, and the basics of metallic bonding, showing how bond type determines the physical properties of substances students encounter daily.

2.1Why Atoms Bond — Achieving StabilityIncluded
2.2Ionic Bonding — Electron TransferIncluded
2.3Properties of Ionic CompoundsIncluded
2.4Ionic Bonding in Real Life — From Table Salt to FertilisersIncluded
2.5Covalent Bonding — Electron SharingIncluded
2.6Simple Molecular Substances & Their PropertiesIncluded
2.7Giant Covalent Structures — Diamond & GraphiteIncluded
2.8Comparing Structures — A Visual TourIncluded
2.9Bonding & Structure Quiz + ReviewIncluded

The Language of Chemistry: Formulae, Equations & The Mole

Builds students' confidence in writing chemical formulae, balancing equations, and using the mole concept for quantitative chemistry calculations.

3.1Chemical Formulae — Reading the CodeIncluded
3.2Word Equations to Symbol EquationsIncluded
3.3Balancing Equations — Step-by-Step PracticeIncluded
3.4Ionic Equations — Stripping It BackIncluded
3.5Introducing the Mole — Counting by MassIncluded
3.6Mole Calculations I — Mass & MolesIncluded
3.7Mole Calculations II — Reacting MassesIncluded
3.8Concentration & Solution CalculationsIncluded
3.9Percentage Composition & Empirical FormulaIncluded
3.10Mole Topic Quiz + Exam-Technique WorkshopIncluded

States of Matter, The Atmosphere & The Water Cycle

Explains kinetic particle theory, changes of state, the composition of air, water purification, and the real-world environmental issues tied to Singapore's water and air resources.

4.1Kinetic Particle Theory — Everything Is MovingIncluded
4.2Changes of State — Melting, Boiling & BeyondIncluded
4.3Diffusion — Particles Spreading OutIncluded
4.4The Atmosphere — What's in the Air?Included
4.5Air Pollutants — Causes, Effects & SolutionsIncluded
4.6The Water Cycle & Singapore's Water StoryIncluded
4.7Water Purification — From Reservoir to TapIncluded
4.8Tests for Water Purity & Dissolved SubstancesIncluded

Acids, Bases & Salts

Develops a thorough understanding of acid-base chemistry, pH, neutralisation reactions, and the preparation and uses of soluble and insoluble salts.

5.1Acids & Bases — The Big PictureIncluded
5.2pH Scale, Indicators & Universal IndicatorIncluded
5.3Strong vs Weak Acids — A Key DistinctionIncluded
5.4Reactions of Acids I — Metals & CarbonatesIncluded
5.5Reactions of Acids II — Metal Oxides & HydroxidesIncluded
5.6Neutralisation in Real Life — Medicine, Soil & IndustryIncluded
5.7Preparing Soluble Salts — Titration & Excess Solid MethodsIncluded
5.8Preparing Insoluble Salts by PrecipitationIncluded
5.9Identifying Ions — Flame Tests & Precipitation TestsIncluded
5.10Acids, Bases & Salts — Topic Quiz & ReviewIncluded

Energy Changes in Chemistry

Explores exothermic and endothermic reactions, activation energy, and factors affecting reaction rates, linking energy concepts to fuels, food, and industrial processes.

6.1Exothermic & Endothermic ReactionsIncluded
6.2Energy from Fuels — Combustion in the Real WorldIncluded
6.3Bond Breaking & Bond Making — Where Energy Comes FromIncluded
6.4Reaction Rate — How Fast Does It Go?Included
6.5Factors Affecting Rate I — Concentration & PressureIncluded
6.6Factors Affecting Rate II — Temperature & Surface AreaIncluded
6.7Catalysts — The Chemistry SuperchargerIncluded
6.8Energy & Rate Topic Quiz + Exam WorkshopIncluded

Oxidation, Reduction & Redox Reactions

Defines oxidation and reduction in terms of oxygen, hydrogen, and electron transfer, and applies redox concepts to rusting, food, and industrial chemistry.

7.1Oxidation & Reduction — Three Ways to Define ThemIncluded
7.2Oxidation States — Assigning & TrackingIncluded
7.3Identifying Oxidising & Reducing AgentsIncluded
7.4Rusting — Redox in the Real WorldIncluded
7.5Preventing Corrosion — Coatings, Sacrificial Anodes & GalvanisingIncluded
7.6Redox in Food & Biology — Antioxidants & RespirationIncluded
7.7Redox & Electrochemistry Topic QuizIncluded

The Periodic Table: Groups & Patterns

Takes a deeper look at Group I, Group VII, Group 0, and the general properties of metals and non-metals, reinforcing trends with engaging demonstrations and real-life links.

8.1Group 0 — The Noble Gases & Why They Don't ReactIncluded
8.2Metals vs Non-Metals — A Periodic DivideIncluded
8.3Reactivity Series of Metals — Building the LadderIncluded
8.4Displacement Reactions — Who Wins the Electron?Included
8.5Extraction of Metals — Reduction & the Blast FurnaceIncluded
8.6Extraction of Aluminium — Electrolysis of BauxiteIncluded
8.7Alloys — Mixing Metals for Better PropertiesIncluded
8.8Periodic Table & Metals Topic Quiz + ReviewIncluded

Nitrogen, Fertilisers & Maintaining Air Quality

Covers the nitrogen cycle, the production and use of ammonia-based fertilisers, and strategies for maintaining clean air — directly relevant to Singapore's urban environment.

9.1The Nitrogen Cycle — Nature's Fertiliser LoopIncluded
9.2Ammonia in Agriculture — From Gas to FertiliserIncluded
9.3Over-Fertilisation & EutrophicationIncluded
9.4Oxides of Nitrogen & Acid RainIncluded
9.5Maintaining Air Quality — Policies & TechnologyIncluded
9.6Fertilisers & Air Quality Quiz + Poster ActivityIncluded

Organic Chemistry — Hydrocarbons & Fuels

Introduces organic chemistry through crude oil, fractional distillation, alkane and alkene chemistry, cracking, and the environmental impact of fossil fuel combustion.

10.1Introduction to Organic Chemistry — Carbon is SpecialIncluded
10.2Crude Oil — A Fossil Fuel MixtureIncluded
10.3Fractional Distillation — Separating the MixIncluded
10.4Alkanes — Structure, Naming & PropertiesIncluded
10.5Combustion of Alkanes — Fuels in ActionIncluded
10.6Cracking — Making Smaller, More Useful MoleculesIncluded
10.7Alkenes — Structure, Naming & Unsaturation TestIncluded
10.8Addition Reactions of AlkenesIncluded
10.9Polymerisation — Making Plastics from AlkenesIncluded
10.10Fuels & Organic Chemistry Topic QuizIncluded

Organic Chemistry — Alcohols & Carboxylic Acids

Extends organic chemistry to the functional-group chemistry of alcohols and carboxylic acids, with strong links to fermentation, vinegar, and everyday consumer products.

11.1Alcohols — Structure, Naming & PropertiesIncluded
11.2Reactions of Alcohols — Combustion, Oxidation & DehydrationIncluded
11.3Fermentation — Biology Meets ChemistryIncluded
11.4Carboxylic Acids — Structure, Naming & PropertiesIncluded
11.5Reactions of Carboxylic Acids — Neutralisation & Reactions with CarbonatesIncluded
11.6Organic Chemistry in Daily Life — Vinegar, Antiseptics & BiofuelsIncluded
11.7Organic Chemistry II Topic Quiz + Worked ExamplesIncluded
11.8Esters — Formation, Naming & UsesIncluded

Experimental Chemistry, Exam Skills & Mock Papers

Consolidates practical investigation skills, qualitative analysis, and full examination technique through structured revision, timed mock papers, and targeted feedback.

12.1Practical Skills Bootcamp — Safety, Apparatus & TechniqueIncluded
12.2Qualitative Analysis — The Systematic Testing ToolkitIncluded
12.3Experimental Design — Planning & Evaluating InvestigationsIncluded
12.4Interpreting Data — Graphs, Tables & AnomaliesIncluded
12.5Exam Technique Workshop I — Structured QuestionsIncluded
12.6Exam Technique Workshop II — Calculation QuestionsIncluded
12.7Cumulative Revision I — Atomic Structure to BondingIncluded
12.8Cumulative Revision II — Moles, Acids & EnergyIncluded
12.9Cumulative Revision III — Redox, Organic & Periodic TableIncluded
12.10Full Timed Mock Exam + Detailed Feedback SessionIncluded

Electrolysis — Splitting Compounds with Electricity

A dedicated module covering the principles, half-equations, and real-world applications of electrolysis — from molten salts to aqueous solutions and industrial processes — mapped to the MOE Combined Science Chemistry syllabus.

13.1What is Electrolysis? — Principles & Key TermsIncluded
13.2Electrolysis of Molten Ionic CompoundsIncluded
13.3Electrolysis of Aqueous Solutions — Selective DischargeIncluded
13.4Half-Equations — Writing Them CorrectlyIncluded
13.5Industrial Electrolysis — Chlor-Alkali & ElectroplatingIncluded
13.6Electrolysis Topic Quiz & Exam TechniqueIncluded

Who it's for

Is this you?

The Sec 3 Fresh Starter

Beginning the two-year journey and wants to build rock-solid foundations in atomic structure, bonding, and the mole before bad habits form.

The Sec 4 Last-Mile Learner

O-Levels are months away and she needs a structured, syllabus-complete revision plan — fast — without falling through the gaps.

The Tutor Seeking a Framework

Supports multiple students and wants a rigorous, MOE-mapped curriculum to anchor his lessons and fill any topic blind spots.

The Supportive Parent

Wants to understand what her child is actually learning so she can ask the right questions and spot when extra help is needed.

The Concept-Crammer Turned Understanding-Seeker

Gets decent grades by memorising but knows he doesn't truly understand redox or mole calculations — and wants that to change before it costs him marks.

The Self-Directed Home Learner

Studies independently alongside school and needs a clear, lesson-by-lesson schedule she can follow at her own pace without a tutor holding her hand.

Questions

Frequently asked

Your teacher

A note from your teacher

Tuition on Demand Academy

Hi — I'm really glad you're here, and I want to talk to you directly for a moment.

If you're a Secondary 3 or 4 student reading this, chances are chemistry feels like one of two things right now: a subject you desperately want to do well in but can't quite crack, or one that made sense at first but is getting harder to keep up with as the topics pile on. Maybe moles feel like abstract nonsense. Maybe you can write ionic equations but you have no idea what they actually mean. Maybe you're secretly worried there isn't enough time left to pull everything together before the O-Levels. I hear you — and I built this course for exactly that moment.

Here's what I know about chemistry at this level: the content is very learnable. Every single topic on the MOE Combined Science Chemistry syllabus has a logical structure and a real-world anchor — the kind that makes you stop and think, "oh wow, that's why rust happens." The problem isn't the chemistry. The problem is usually that it gets presented as a wall of definitions and equations before the idea behind it has had a chance to land. I've designed every lesson in this course to flip that around: real-world hook first, concept second, exam application third, and always — always — a clear "why this matters" moment at the end.

The course runs from the very first principles (what's actually inside an atom, and why does it bond?) all the way to organic chemistry, electrochemistry, and a full suite of timed mock papers built to O-Level standard. I've mapped it to a two-year schedule that can fit around school, CCAs, and everything else in your life — 30 minutes at a time, consistently, is genuinely enough to build mastery when the lessons are designed well. And for the exam itself, technique is practised throughout: structured-question workshops, calculation walkthroughs, qualitative analysis toolkits, and a final mock with detailed feedback so you know exactly where you stand.

If you're a parent or tutor reading this: I've made the explanations clear enough that you can follow along and support your student, and rigorous enough that every past-paper demand is addressed. You're not handing your child over to vague "exam tips" — you're giving them a complete, sequenced curriculum they can own.

So whether you're starting in Secondary 3 with time to build strong foundations, or jumping in during Secondary 4 looking to consolidate and sharpen up fast — this is the place. Let's make chemistry click. I'll see you in the first lesson.