MYP Maths: Unpacking Word Problems — How It's Assessed and How to Get Better at It

According to the MYP: Mathematics guide, Criterion D specifically asks students to 'apply the selected mathematical strategies successfully to reach a solution' in real-life contexts — so an examiner is looking for evidence you chose the right tool, not luck. A correct answer with no working, or working that doesn't match the scenario given, typically caps you at the lower achievement bands even if the arithmetic is fine.

Quick tip: if a task sheet says 'justify your answer' or 'explain your reasoning', that's a direct Criterion D command term — skipping it is the single most common reason strong students lose top marks on word problems.

I tell every student I teach: read it twice before you write anything. First pass for the story, second pass to underline numbers, units and the actual question mark. Most errors happen because a student starts calculating on the first read.

Common mistake: students see a number and a keyword ('total', 'more than') and jump to an operation without checking the whole sentence structure. 'How much more' can mean subtraction or division depending on context — the keyword alone isn't enough.

Worked example: "A cinema sells adult tickets for GBP 12 and child tickets for GBP 7. On Saturday it sold 150 tickets total for GBP 1,400. How many child tickets were sold?"

1. Question: find number of child tickets.
2. Given: adult = 12, child = 7, total tickets = 150, total revenue = 1400.
3. Variables: let $a$ = adult tickets, $c$ = child tickets.
4. Method: simultaneous equations — $a+c=150$ and $12a+7c=1400$.
5. Solve: from the first, $a=150-c$. Substitute: $12(150-c)+7c=1400\Rightarrow 1800-12c+7c=1400\Rightarrow -5c=-400\Rightarrow c=80$.

Check: 70 adults × 12 = 840, 80 children × 7 = 560, total = 1400. Correct — and the units (tickets, GBP) match the question asked.

Quick checklist:

1. Did I answer what was asked (not just find a number)?
2. Are my units correct and stated?
3. Does the size of my answer make sense in context (e.g. not 400 people in a lift)?
4. Is every step of my working visible, not just mental jumps?
5. Did I re-read the question after finishing, to check I haven't answered a different question than the one set?

Spotting the clue before you calculate saves time you'd otherwise lose picking the wrong method and starting again.

Common mistake: a question asks for the difference in height but a student calculates and states the total height, because they stopped reading after the numbers and missed the actual question at the end of the sentence. Always find the question mark first.

According to IB guidance on the MYP eAssessment structure, Mathematics on-screen papers include extended-response items set in unfamiliar real-world contexts, deliberately mirroring Criterion D. Practising past on-screen sample questions under timed conditions is the closest you'll get to simulating that pressure before the real thing.

Criterion B (Investigating Patterns) and Criterion C (Communicating) can also apply if the task involves generalising a pattern from a word context or requires a structured written explanation — so a single well-designed word problem task can realistically touch three of the four criteria at once.

Because Criterion D specifically exists to test real-life application, a student who's strong at pure calculation but weak at unpacking scenarios will typically see that gap show up as a lower Criterion D score even with solid Criterion A marks elsewhere.

The fix isn't more calculation drilling — it's more timed practice with unfamiliar, worded scenarios, ideally reviewed against the actual command terms used in MYP Mathematics (justify, apply, select). Topical worksheets that isolate real-life context questions, rather than pure number practice, tend to close this gap fastest.

Past MYP-style sample questions and topical worksheets organised by real-life context (rather than by pure topic) are more useful here than a generic textbook, since the skill being built is translation, not computation. RevisionPrep's Topical Worksheets for MYP 4-5 Mathematics are organised this way, alongside Revision Notes that break down each command term.