Does MYP Extended Mathematics have more criteria than Standard Mathematics?

No. Both Standard Mathematics and Extended Mathematics use the same four criteria, labelled A to D. The difference lies in the breadth, depth and complexity of the mathematical content students study. Extended Mathematics includes additional knowledge and more demanding applications intended to prepare students for advanced mathematical study. It does not add a fifth criterion or give Criterion A more formal weight. Students in both courses must demonstrate knowledge, investigation, communication and real-life application.

Is each MYP Extended Mathematics criterion marked out of 8 or 25?

Both figures can be correct, but they apply in different assessment contexts. In school-based criterion assessment, each of the four criteria has a maximum achievement level of 8, giving a combined total of 32. In the external on-screen eAssessment, each criterion contributes 25 raw marks to a paper totaling 100 marks. A criterion level is a best-fit judgment against descriptors, while an examination mark records credit earned on specific questions. Students should therefore never convert an internal level of 6 directly into 18.75 examination marks.

How is Criterion C assessed in the Extended Mathematics eAssessment?

Criterion C, Communicating, is assessed across all three broad examination tasks. Students demonstrate it through correct notation, suitable representations, coherent reasoning and logically organized working. The official blueprint assigns Criterion C a total of 25 marks across the complete examination. This means communication is not confined to a separate writing section. Clear definitions, labelled diagrams and connected mathematical arguments can matter in knowledge, investigation and modelling responses alike.

How does a criterion total out of 32 become an MYP grade out of 7?

At school, the four final criterion levels are added to produce a total out of 32. The school then applies its documented reporting conversion to award a subject grade from 1 to 7. A commonly used conversion places totals of 24--27 in grade 6 and 28--32 in grade 7, but students should verify their school's current policy. Teachers determine each criterion level through best-fit judgment rather than automatically averaging every task score. This internal process should not be confused with the conversion of external eAssessment marks out of 100.

Are MYP Extended Mathematics eAssessment grade boundaries fixed every year?

No. The IB sets grade boundaries for the relevant subject and examination session after considering the assessment's demands and established grade standards. A raw mark that earns a grade 7 in one session is therefore not guaranteed to earn the same grade in another. Previous boundaries can help students interpret mock performance, but they are not predictions or promises. Coordinators should consult the official boundary information for the exact session when results are released. Students should focus on maximizing marks across all four criteria rather than aiming at an assumed historical cutoff.

Which MYP Extended Mathematics criterion is most important?

None is officially more important because the four mathematics criteria are equally weighted. Internally, each has a maximum level of 8, and in the external eAssessment each contributes 25 marks. Criterion A may feel most prominent because it covers mathematical knowledge and procedures, but success in calculations alone cannot compensate fully for weak investigation, communication or modelling. Criterion C is especially easy to neglect because its evidence appears across different tasks. Effective preparation should therefore include balanced practice for A, B, C and D.

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MYP Extended Mathematics: How Many Criteria?

MYP Extended Mathematics Assessment MYP IB Math IB Grading

Emma C.

• 11 Sept 2026•10

MYP Extended Mathematics: How Many Criteria?

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MYP Extended Mathematics: How Many Criteria? | RevisionDojo

Back to all posts

MYP Extended Mathematics: How Many Criteria?

MYP Extended Mathematics Assessment MYP IB Math IB Grading

Emma C.

• 11 Sept 2026•10

MYP Extended Mathematics has four assessment criteria, labelled A, B, C and D: Knowing and understanding, Investigating patterns, Communicating, and Applying mathematics in real-life contexts.

Standard and Extended Mathematics use the same criteria. Extended Mathematics differs through the greater breadth, depth and complexity of its content, not through an extra criterion. The distinction between classroom assessment and the external eAssessment is also important because they use different marking scales.

The four MYP Extended Mathematics criteria

The IB describes the mathematics criteria as equally weighted. In school-based assessment, each has a maximum achievement level of 8, producing a combined maximum of 32.

Criterion	Name	What it measures	Maximum internal level
A	Knowing and understanding	Selecting and applying appropriate mathematics to solve problems	8
B	Investigating patterns	Identifying patterns, developing rules and justifying conclusions	8
C	Communicating	Using correct notation, representations and logical organization	8
D	Applying mathematics in real-life contexts	Modelling situations and evaluating mathematical results	8

The official IB mathematics subject brief summarizes these criteria and the on-screen examination. RevisionDojo also provides a practical explanation of MYP Mathematics Criteria A, B, C and D.

Criterion A: Knowing and understanding

Criterion A assesses whether you can select suitable mathematics and apply it successfully. Evidence may include accurate algebra, correct formula use and effective methods for familiar or unfamiliar problems.

Extended Mathematics questions can require more advanced techniques than the standard course, but they still assess Criterion A. A correct answer is valuable, although visible working may be needed to demonstrate the method fully.

Criterion B: Investigating patterns

Criterion B concerns mathematical investigation. You may need to generate results, identify a pattern, formulate a general rule and justify why it works.

For example, observing that a sequence changes by successive odd numbers is only a starting point. A stronger response proposes a rule such as $a_n=n^2$ , tests it and supports the generalization with mathematical reasoning.

Criterion C: Communicating

Criterion C assesses how effectively you present mathematics. Correct symbols, labelled graphs, suitable representations, coherent reasoning and a logical structure can all provide evidence.

Communication is not simply neat handwriting. An undefined variable, unsupported calculator result or graph without labelled axes can weaken a response even when the underlying idea is correct.

Criterion D: Applying mathematics in real-life contexts

Criterion D assesses mathematical modelling in an authentic context. You identify relevant information, choose a strategy, solve the problem, and interpret and evaluate the result.

If a model predicts $18.7$ buses, the practical answer may be 19 buses. A complete response explains that decision and considers whether the model's assumptions are reasonable. RevisionDojo's guide to how MYP Mathematics is assessed and revised offers additional criterion-specific advice.

How internal MYP Mathematics grading works

In classroom assessment, teachers award an achievement level for each criterion. The scale is 0 to 8: levels 1 to 8 correspond to achievement descriptors, while 0 means the work has not reached the standard described by the first band.

Teachers use best-fit judgment based on the available evidence. A final criterion level is therefore not necessarily an average of every task score. Schools must provide opportunities to demonstrate every strand, while their assessment policies explain the exact reporting process.

A final set of levels might be:

Criterion	Final achievement level
A: Knowing and understanding	7
B: Investigating patterns	6
C: Communicating	7
D: Applying mathematics in real-life contexts	5
Total	25 out of 32

The school converts this total into a reported 1-to-7 grade using its authorized reporting approach. Many MYP schools use a conversion in which 24--27 corresponds to grade 6, but students should confirm the table in their school's current assessment policy.

Crucially, 25 out of 32 is a criterion total, not 78.125% on an examination. Criterion levels describe the quality of demonstrated achievement rather than ordinary test points. RevisionDojo's guide to MYP grade boundaries explains the 0--8, 0--32 and 1--7 scales further.

How the MYP Extended Mathematics eAssessment works

The optional external MYP Extended Mathematics eAssessment is an on-screen examination taken at the end of MYP Year 5. The IB's MYP assessment page explains how external assessment can lead to MYP course results or contribute to the MYP Certificate.

The mathematics blueprint organizes the examination into three broad tasks:

Examination task	Main criteria assessed	Approximate task marks
Knowing and understanding	A and C	31--35
Investigating patterns	B and C	31--35
Applying mathematics in real-life contexts	C and D	31--35
Whole examination	A, B, C and D	100

Each criterion contributes 25 raw marks across the examination. Criterion C appears across all three tasks, so clear communication matters throughout the paper rather than only in one extended response.

Context	Scale before final grade	Conversion
School-based assessment	Four levels out of 8, totaling 32	School reporting process converts the total to 1--7
External eAssessment	Raw marks totaling 100	IB session-specific boundaries convert the mark to 1--7

Students can use the MYP Extended Mathematics resource hub and Extended Mathematics Questionbank while identifying which criterion each response demonstrates.

How eAssessment grade boundaries work

Official grade boundaries convert the external raw mark into a final grade from 1 to 7. The IB establishes them for the relevant subject and examination session, so an earlier session's boundary is not guaranteed to remain unchanged.

For illustration only, suppose a student scores 72 out of 100, with grade 6 beginning at 68 and grade 7 at 79. The result would be grade 6 because $68 \leq 72 < 79$ . These figures explain the method and are not current official boundaries.

Coordinators should use official session documentation when interpreting results. Students should not convert mock percentages through the classroom 32-point table because the two systems assess different evidence.

The eAssessment result may contribute to the MYP Certificate. Under the IB's grading and awards guidance, the certificate has a maximum of 56 points, and candidates must meet all certificate conditions.

Common mistakes about the criteria

Assuming Extended Mathematics has extra criteria: It uses the same four as standard mathematics.
Calling an 8 a final subject grade: Eight is the maximum level for one criterion; subject grades run from 1 to 7.
Treating criterion levels as percentages: A level 6 is descriptor-based, not automatically 75%.
Assigning Criterion C to one task: Communication is assessed across all three eAssessment task types.
Using classroom boundaries externally: Internal totals are out of 32; the eAssessment is marked out of 100.
Revising only Criterion A: Investigation, communication and modelling are also formally assessed.

Effective revision should combine procedural questions, pattern investigations, clearly presented solutions and contextual modelling. After answering, ask which criterion evidence an examiner can actually see.

Conclusion

MYP Extended Mathematics has four equally weighted criteria: A, Knowing and understanding; B, Investigating patterns; C, Communicating; and D, Applying mathematics in real-life contexts. Internally, each has a maximum level of 8, while the external eAssessment allocates 25 raw marks to each criterion within a 100-mark examination.

Classroom criterion totals and external marks are not interchangeable. RevisionDojo's Questionbank, Study Notes, Flashcards and Jojo AI can support balanced practice across all four criteria.

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The four MYP Extended Mathematics criteria

The IB describes the mathematics criteria as equally weighted. In school-based assessment, each has a maximum achievement level of 8, producing a combined maximum of 32.

Criterion	Name	What it measures	Maximum internal level
A	Knowing and understanding	Selecting and applying appropriate mathematics to solve problems	8
B	Investigating patterns	Identifying patterns, developing rules and justifying conclusions	8
C	Communicating	Using correct notation, representations and logical organization	8
D	Applying mathematics in real-life contexts	Modelling situations and evaluating mathematical results	8

The official IB mathematics subject brief summarizes these criteria and the on-screen examination. RevisionDojo also provides a practical explanation of MYP Mathematics Criteria A, B, C and D.