How to study Math vs Econ: practice vs concept subjects

Your method works for Math but not Econ because the two subjects reward different things. Practice subjects like Math reward solving problems you couldn’t solve last week, so you get better by chasing the uncomfortable. Concept subjects like Economics reward a clear structure of causes and consequences expressed in precise keywords, so you build the structure first and memorise last. Most students use one method for everything, and one of their subjects quietly suffers.

I’ve taught Math, Economics and Chemistry for six or seven years, and took H2 Math, Economics, Chemistry and Biology myself, finishing with 90 rank points. The single biggest fix I see is matching the method to the subject.

What’s the difference between a practice subject and a concept subject?

A practice subject tests whether you can do something. A concept subject tests whether you can explain something. Most subjects are a mix, but one side usually dominates.

Mixed subjects like Chemistry and Physics need both: practise the calculations like Math, build the theory like Econ.

How should I study a practice subject like Math?

Chase the uncomfortable stuff. Practise smart, not just a lot. I call this the uncomfortable-first rule.

Most students practise Math the comfortable way. They redo topics they already like, get most questions right, and feel good. That’s practice for your confidence, not your grade. The marks you’re missing live in the topics you avoid.

Here’s the rule in four steps:

1. Rank every topic by comfort. List all the topics and mark each one comfortable, shaky or avoid-at-all-costs. Be honest. The “avoid” pile is your syllabus now.
2. Spend most of your practice time on shaky and avoid. Comfortable topics get a mixed question now and then to keep them warm.
3. Struggle, then study, then redo. Give a hard question a real, time-boxed attempt. If you’re stuck, study the worked solution line by line. Then close it and redo the question from a blank page two days later. If you can’t, it isn’t learned yet.
4. Keep a mistakes log. One line per error: the question, what went wrong, and the fix. Your mistakes log becomes your best revision material, because it’s a list of exactly what you get wrong.

Why mix topics instead of doing one chapter at a time?

Because the exam doesn’t tell you which chapter a question comes from. Practising one chapter at a time hides the hardest part: working out which method to use.

Researchers call mixing topics “interleaving”. In one study, college students who practised shuffled math problems scored 63% on a test a week later, against 20% for students who practised one problem type at a time, even though the shuffled group did worse during practice (Rohrer & Taylor). A later classroom study with 12- and 13-year-olds found the same pattern (Rohrer, Dedrick & Stershic).

Learn a new topic in a block. Then revise it mixed in with everything else.

Mixed practice feels worse. That’s the point.

How should I study a concept subject like Economics?

Build it like a house: structure, then cause and consequence, then keywords, then memorise. I call this the four-floor build. Skipping floors is why “I memorised everything and still did badly” happens.

Floor 1: Structure

Before you learn any detail, understand what the whole subject is trying to do. Get the official syllabus document for your subject from SEAB (A-level syllabuses are listed on its A-level school candidates page; O-level ones are on the same site) and turn it into a one-page map: the big sections, and how they connect.

Economics is a good example, because it’s new to most students. It isn’t really about money. It’s about mechanics: actions and their consequences, what causes what. Once you see that, the chapters stop looking like a list and start looking like one machine.

Compartmentalise first. Every new fact then has a box to go into.

Floor 2: Cause and consequence

Next, turn each section into chains: this happens, which causes that, which leads to this. Write them as arrows, not paragraphs.

A general example: a cost goes up → firms produce less at each price → supply falls → the price rises and the quantity bought falls. Each arrow is a step an examiner wants to see you explain.

Test yourself by covering one link and asking “why does this lead to that?” If you can’t answer, the chain is broken, and no keyword will fix it.

Floor 3: Keywords

Only now do you fill in the precise terms, and be very targeted about it. Find the words that earn marks from mark schemes and your teachers’ model answers, and attach each one to the arrow it belongs to.

Keywords stuck onto a chain are remembered. Keywords learned as a list are forgotten by Tuesday.

Floor 4: Memorise

The last mile is always memorisation. There’s no shame in it, and no way around it. Use active recall and spaced repetition: write the chains from memory, check, mark the gaps, and come back at growing intervals. The full setup, with a printable planner, is in active recall and spaced repetition, step by step.

Why doesn’t memorising first work?

Because facts with nothing to hang on fade fast, and application questions need connections you never built. Memorising first feels efficient. Then the exam asks you to apply an idea to a situation you haven’t seen, and a memorised list can’t do that.

Study research points the same way. Asking yourself “why is this true?” and explaining how ideas connect both help learning, while summarising and highlighting rate poorly (Dunlosky et al.; summary from the AFT). The four-floor build does the “why” work on Floor 2, before you memorise.

What if I’m just not interested in a subject?

Find its first principles. Students who aren’t interested in a subject tend to do badly in it, and the subject often feels boring because it looks like a pile of unrelated facts.

Ask the question underneath the topic: why does this happen at all? Once a subject has a few core ideas that explain most of the rest, it gets more interesting and easier to remember at the same time. You don’t have to love every subject. You need it to make enough sense that the facts have somewhere to live.

How do I split my week across both kinds of subject?

Give practice subjects frequent short sessions, and concept subjects fewer, structured ones.

• Practice subjects: a little most days. Problem-solving skill fades if you stop, and mixed practice works best spread out.
• Concept subjects: build floors 1–3 in longer, focused blocks when a new topic starts. Then switch to short daily recall sessions for floor 4.
• Mixed subjects: split the time. Calculations get practice-subject treatment, theory gets the four floors.

At A-levels especially, you need to be consistent across every subject. Don’t let your favourite subject eat your whole week. Prelims are where inconsistency shows first, and for some applications they count: see do prelims matter?.

Who does this not apply to?

• Language subjects and General Paper don’t fit neatly. They’re skills built over months by reading, writing and getting feedback. Some parts work like a practice subject (essay writing), and some like a concept subject (content you need for arguments).
• If you’re missing basics from earlier years, fix those first. No amount of uncomfortable-first practice helps if the foundation underneath is missing.
• Labels are a guide, not a law. If a method isn’t working after a few weeks of honest effort, switch.