The model method remains a legitimate and often efficient way to solve PSLE word problems, but by Primary 6 some problems are faster with the algebraic thinking the syllabus introduces that year.
What the model method is actually for
A model turns a word problem into a picture of relationships. Its value is that it makes the structure visible — who has more, by how much, and what stays constant.
That is why it works. A student who can draw the situation has already done most of the thinking; the arithmetic that follows is usually straightforward.
Where models start to strain
Problems with several changing quantities, or where a value changes partway through, produce models that are hard to draw and harder to read.
Primary 6 introduces algebra precisely because some relationships are easier to write than to draw. A student who can use both tools chooses; a student who knows only one has to make the tool fit.
A model is likely the right tool when:
- The problem compares quantities — more than, less than, twice as many
- A total is shared in parts
- One quantity stays unchanged while another varies
- The question can be answered from the picture without further working
Drawing models that actually help
The commonest failure is a model drawn without labels. Bars that are not labelled with what they represent become decoration, and the student ends up reasoning from the words anyway.
The second is proportion. If one bar is meant to be twice another, it should look it. A model drawn carelessly misleads the person who drew it.
Teaching the switch
The useful question is not which method is superior but which is faster for this problem. Ask your child to try both on the same question occasionally and compare.
Where a model needs redrawing after every step, algebra is probably the better route. Where the relationship is a simple comparison, the model usually wins.
What lessons at Odyssey are actually like
A student describes the experience in her own words. She is in secondary school, and the teaching she describes is what we do at primary level too. More are on Odyssey Math TV.
Where Odyssey fits
We teach both, and we teach children to choose between them, because the PSLE rewards whichever gets to a correct, well-presented answer.
We teach maths only, in small classes at Hexacube, 160 Changi Road #01-02, about three minutes from Eunos MRT. See the primary and secondary programmes, our MOE-aligned curriculum, schedules and fees, or the tutors who teach. Free video solutions to past-year papers are on Odyssey Math TV.
It is also why a difficulty in one year is so often a leftover from an earlier one. Because our curriculum spans Primary 1 through Primary 6, we can go back to the genuine cause rather than treating the symptom in front of us. A child struggling with Primary 5 fractions frequently has a Primary 3 equivalence problem, and no amount of Primary 5 practice will resolve it.
Start with the free trial lesson. We use it to work out where the difficulty really sits, and we will say so plainly — including if we think the sensible course is to wait a term and watch. Parents generally find that more useful than a confident sales answer. Get in touch or WhatsApp +65 8512 6882.
What we describe here comes from teaching this syllabus in our own classes since 2012. It is not a forecast for any individual child: progress is produced jointly, by a student willing to do the work with support at home. We do not promise grades. Topics follow the MOE primary mathematics syllabus — check the current syllabus on the MOE website for the definitive version, and see our curriculum page for how we teach it.
Frequently asked questions
Is the model method still examined?
Models are a solving strategy rather than an examined topic. Marks are for correct working and answers, and a clear model is a perfectly acceptable form of working.
Should my child stop using models at Primary 6?
No. They should add algebra as an alternative and learn when each is faster.
Why does my child draw a model and then not use it?
Usually because it is unlabelled. An unlabelled model cannot be read back, so the student reverts to the words.
Do models need to be drawn to scale?
Roughly proportional, yes. A model that misrepresents the relationships will mislead the student using it.
