How MYP Extended Mathematics criteria levels become a final grade
For school-based MYP Extended Mathematics assessment, the calculation is:
Each criterion receives a final achievement level from 0 to 8. The four levels are added, then the total is converted into a subject grade from 1 to 7 using the general MYP boundary table.
The official MYP Extended Mathematics eAssessment works differently. It is an externally marked on-screen examination, so the IB converts the examination raw mark into a 1–7 grade using boundaries established for that subject and examination session. An internal criterion total out of 32 must not be confused with an eAssessment raw mark.
The four assessment criteria
The official IB Mathematics subject brief identifies four equally weighted criteria. Extended and standard Mathematics use the same criteria, although Extended Mathematics has greater breadth and depth.
| Criterion | Main focus | Maximum level |
|---|---|---|
| A: Knowing and understanding | Selecting and applying mathematical knowledge and methods | 8 |
| B: Investigating patterns | Finding patterns, developing rules, testing, and justifying conclusions | 8 |
| C: Communicating | Using correct notation, representations, language, and organization | 8 |
| D: Applying mathematics in real-life contexts | Modelling situations, interpreting results, and evaluating solutions | 8 |
Because every criterion has the same maximum, each contributes one quarter of the possible total. Criterion A is not weighted more heavily simply because conventional tests often emphasize procedural questions.
A criterion level of 6 does not mean 60 percent. Teachers compare the student's evidence with published descriptors and use a best-fit judgment to select the level that most accurately represents demonstrated achievement.
Step 1: Determine each final criterion level
Before calculating the total, the teacher determines a final level for Criteria A, B, C, and D. This should not normally be produced by mechanically averaging every task result.
Suppose a student receives Criterion B levels of 4, 5, and 7. Although the arithmetic mean is 5.33, that does not automatically make the final level 5. The teacher considers the quality, consistency, relevance, and recency of the evidence according to the criterion descriptors and school assessment policy.
This approach matters because MYP assessment measures what a student has demonstrated, not merely accumulated points. A substantial later investigation might provide convincing evidence of improved achievement, while a short task might assess only some strands of a criterion.
RevisionDojo's Extended Mathematics marks guide further explains the distinction among task marks, criterion levels, criterion totals, and final grades.
Steps 2 and 3: Add the levels and convert the total
Once the four final levels have been established, they are added without additional weighting:
As each criterion has a maximum of 8, the highest possible total is 32. This number is a criterion total, not an examination percentage, and should not be converted into a percentage before assigning the final grade.
| Criterion total out of 32 | Final MYP grade |
|---|---|
| 1–5 | 1 |
| 6–9 | 2 |
| 10–14 | 3 |
| 15–18 | 4 |
| 19–23 | 5 |
| 24–27 | 6 |
| 28–32 | 7 |
A total of zero falls outside the published 1–7 ranges and generally indicates that no assessable standard has been demonstrated. Schools should follow their authorized reporting policies when evidence is missing or insufficient.
These boundaries are not percentage definitions. Although , an MYP grade 6 is not officially defined as 75 percent. Percentage conversion creates false precision and can misrepresent criterion-related assessment.
Worked example
Consider these final achievement levels:
| Criterion | Final level |
|---|---|
| A: Knowing and understanding | 7 |
| B: Investigating patterns | 6 |
| C: Communicating | 5 |
| D: Applying mathematics in real-life contexts | 7 |
| Total | 25 out of 32 |
The calculation is . Because 25 falls within the 24–27 range, the student's school-based final grade is 6.
Raising Criterion C from 5 to 6 would produce 26, which remains a grade 6. A grade 7 requires at least 28, meaning three additional supported criterion points are needed. Teachers cannot award unsupported points merely because a student is close to a boundary.
Internal grades and eAssessment results are different
A common mistake is applying the 32-point classroom table directly to the official on-screen examination. Although both systems reflect the MYP Mathematics criteria, their calculations are not interchangeable.
| School-based final grade | Official Extended Mathematics eAssessment |
|---|---|
| Teacher evaluates work against four criteria | IB examiners mark examination responses |
| Each criterion receives a level from 0 to 8 | Responses receive raw marks from the markscheme |
| Levels are added to produce a total out of 32 | Raw marks form the examination total |
| General 32-point conversion table is used | Session-specific grade boundaries are used |
| Result is reported by the school | Result is an IB-validated course result |
The subject brief organizes the on-screen examination around knowing and understanding, investigating patterns, and applying mathematics in real-life contexts. Communication is assessed across the examination rather than through one isolated communication task.
The IB does not assign four examination levels out of 8 and add them to 32. Instead, examiners award raw marks, and the total is compared with the official Extended Mathematics boundaries for that examination session.
Why eAssessment boundaries can change
The IB's assessment principles explain that grade awarding draws on expert judgment, candidate work, and statistical evidence. This allows boundaries to account for differences in examination difficulty while maintaining the intended standard.
A previous boundary can support a rough practice estimate, but it cannot guarantee a future grade. Students must use the table for the exact subject and session. Standard Mathematics boundaries should never replace Extended Mathematics boundaries because the courses have separate examinations, content demands, and grade awards.
The IB's MYP grading and awards page confirms that eAssessment subject results are reported from 1 to 7 and explains how results contribute to course awards and the MYP certificate.
Common grading mistakes
- Averaging every task mechanically: Final criterion levels should reflect descriptor-based judgment under the school's assessment policy.
- Treating one criterion level as the final grade: A level 7 in Criterion A does not produce a subject grade 7 unless the combined total reaches the relevant boundary.
- Ignoring Criterion C: Correct notation, graph labels, representations, reasoning, and logical organization all contribute to communication evidence.
- Using internal boundaries for eAssessment: The 28–32 grade 7 range applies only to the school-based criterion total.
- Treating predicted boundaries as official: Estimates remain uncertain until the IB completes grade awarding for that session.
Practical advice
Students should track their evidence separately for A, B, C, and D. After each task, identify which strands were demonstrated and what remains weak instead of recording only an overall task mark.
Revision should include procedural questions for Criterion A, investigations for Criterion B, carefully presented reasoning for Criterion C, and modelling problems for Criterion D. The MYP Mathematics assessment and revision guide explains how to organize this practice.
Schools should label reported results clearly, such as 25/32 criterion total or grade 6, and avoid presenting unofficial percentages as IB conversions. Students seeking targeted practice can use the Extended Mathematics resource hub, Extended Mathematics Questionbank, and the guide comparing standard and extended MYP Mathematics.
Conclusion
For school-based reporting, determine one supported level from 0 to 8 for each criterion, add the four levels to obtain a total out of 32, and convert that total into a 1–7 grade. Official eAssessment instead converts externally awarded raw marks through session-specific Extended Mathematics boundaries.
RevisionDojo's Questionbank, Study Notes, and Jojo AI can support criteria-aware practice. Results should nevertheless be interpreted using the correct school assessment policy or official IB session documentation.
Sources and referenced URLs
- IB Mathematics subject brief
- IB assessment principles and practices
- IB MYP grading and awards
- IB overview of Mathematics in the MYP
- RevisionDojo guide to Extended Mathematics marks
- RevisionDojo guide to MYP Mathematics assessment and revision
- RevisionDojo Extended Mathematics resources
- RevisionDojo Extended Mathematics Questionbank
- RevisionDojo comparison of Standard and Extended Mathematics
