Knowledge gap
A definition, fact or relationship is missing. Return to a clear explanation and a small worked example before doing a longer set.
Choose Primary or Secondary and answer twelve original questions across number, algebra, geometry and data. Instant marking groups mistakes by topic and reveals worked answers for a focused revision plan.
This is a broad diagnostic, not a prediction of a school or national-examination grade. Complete one level without notes or calculator help unless a question explicitly requires it. A low score can reflect untaught content, reading, arithmetic, method choice or pacing, so the review begins with the first wrong decision rather than the final mark.
Choose the level closest to current learning. Work on paper and select an answer only after committing to a method. If a topic has not been taught, mark it for later instead of guessing that it is a weakness.
Correct answers can still hide fragile reasoning. Compare the setup, operation, unit and final interpretation. For an error, circle the first line where your reasoning changes from the worked route.
Choose one or two recurring topics, review the underlying concept and try a changed question after two or three days. Do not immediately repeat the same twelve questions from memory.
A useful review separates knowledge, representation, execution and checking. The same topic label may need a different response depending on where the first wrong decision occurred.
A definition, fact or relationship is missing. Return to a clear explanation and a small worked example before doing a longer set.
The learner knows facts but cannot translate the words, diagram or data into a mathematical form. Practise naming knowns, unknowns and relationships.
The method is suitable but signs, place value, arithmetic or algebraic steps fail. Use slower written working and an inverse check.
The answer conflicts with units, scale or context but is accepted. Build estimation, substitution and reasonableness into the final line.
Group two or more related errors before changing the plan. One mistake may be accidental; a repeated pattern across different wording is stronger evidence.
| Signal | Review first | Evidence of improvement |
|---|---|---|
| Whole numbers, decimals or fractions | Place value, operation meaning, estimation and equivalent forms | A changed calculation is accurate and its size is predicted before working |
| Percentage, ratio or rate | The whole, ratio parts, unit order and multiplicative comparison | The learner labels quantities and explains why division or multiplication is used |
| Algebra, indices or functions | Variable meaning, equivalence, sign rules and substitution | The final value makes both sides equal or produces the expected function output |
| Area, volume, circles or Pythagoras | Diagram conditions, formula choice and consistent units | The learner distinguishes length, square units and cubic units and checks scale |
| Average, statistics or probability | Data order, centre, spread, equally likely outcomes and interpretation | The learner states what the summary describes and what it does not guarantee |
| Several unrelated topics | Reading routines, written organisation, arithmetic fluency and pacing | Fewer avoidable errors appear in a shorter mixed set under calm conditions |
No. Every question is original OpenSchoolbag practice informed by common school mathematics domains. The test does not reproduce an official paper or claim to predict an examination score.
Use Primary for broad upper-primary number, ratio, measurement and data relationships. Use Secondary for algebra, geometry, indices, probability and related applications. Untaught content should be labelled, not counted as a diagnosed weakness.
No. Start with a foundation that affects several later questions, such as fractions, variable meaning or units. Review one small idea, practise it and then retry a changed question before adding another topic.
The test runs in the browser and does not create an account or permanent student record. Write down the topic pattern and planned retry date if you want to track progress across sessions.
Return to the Singapore Maths Lab, review number work with the step-by-step arithmetic calculator, investigate equations with the algebra calculator or place corrections into your next study week.