The main difference between school-based and IB-set MYP Extended Mathematics assessment is who creates and marks it. School-based tasks are designed and marked by teachers, while the IB-set Extended Mathematics eAssessment is a formal on-screen examination created by the IB and externally marked by IB examiners.
School assessment supports classroom learning and local reporting. The IB-set examination can contribute to an official MYP course result or the full MYP certificate. Exact arrangements vary, so candidates should follow their coordinator's instructions.
The difference at a glance
| Feature | School-based assessment | IB-set assessment |
|---|---|---|
| Creation | Teacher or school | International Baccalaureate |
| Marking | School teachers | Trained IB examiners |
| Format | Tests, investigations, projects, modelling, or presentations | Formal on-screen examination |
| Timing | School teaching calendar | May or November examination session |
| Purpose | Feedback, reporting, and progress measurement | Official externally assessed course result |
| Standardization | School applies MYP criteria | Common IB examination and external marking |
| Participation | Part of normal MYP teaching | Optional for schools, but required for the relevant official result |
A school-based assessment can still be formal, timed, and modelled closely on eAssessment. It remains school-based because the school controls its design, administration, and marking.
How school-based assessment works
The MYP uses criterion-related assessment, meaning teachers judge work against published criteria rather than ranking students. Mathematics assessment covers knowing and understanding, investigating patterns, communicating, and applying mathematics in real-life contexts.
Teachers may use topic tests, cumulative examinations, investigations, modelling problems, written explanations, presentations, and practice on-screen examinations. These marks may affect reports, predicted grades, course placement, or progression decisions. However, ordinary teacher-created coursework does not become the externally marked Extended Mathematics result.
How the IB-set assessment works
The IB-set assessment is a two-hour on-screen examination offered in May and November. The IB's MYP on-screen examination overview states that Extended Mathematics is available in English and French.
The examination includes three broad task types:
- Knowing and understanding, including mathematical communication
- Investigating patterns, including interpretation and generalization
- Applying mathematics in real-life contexts, including modelling and evaluation
Communication is assessed throughout rather than in a separate final section. Extended Mathematics requires greater breadth and depth than the standard course, so students should expect unfamiliar applications, algebraic reasoning, and multi-step problems.
Unlike an ePortfolio, the examination is individually and externally marked. Its result may contribute to an MYP course result or the full certificate, depending on the student's registration.
Understanding official results and school grades
School reports and IB results answer different questions. An internal grade summarizes performance across tasks selected by the school, often over a term or year. The external result reflects performance in one standardized examination session. Consequently, the two outcomes may differ without either being incorrectly calculated.
For official MYP assessment, the IB awards subject grades on a 1-to-7 scale after external marking and grade-award processes. Teachers may use the same scale internally, but an internally reported 6 is not automatically equivalent to an official IB 6. Boundaries and reporting practices should not be assumed from a classroom percentage.
When reviewing results, ask whether the document shows a school grade, predicted grade, or IB course result. This distinction matters for applications and progression because institutions may interpret each document differently. If a result seems surprising, discuss the component and registration details with the MYP coordinator rather than comparing raw marks from unrelated school tasks.
eAssessment logistics and exam day
Schools register candidates through the IB system. A student may take Extended Mathematics alone, several eAssessment subjects, or all components required for the certificate. Current examination windows and deadlines appear on the IB's registration information page.
The school manages registration, approved devices, software checks, invigilation, candidate identification, inclusive access arrangements, and secure response submission. The IB sets and marks the assessment, but the school provides the controlled examination environment.
On exam day, attend at the time and place specified by your coordinator. Ask beforehand about identification, permitted equipment, rough work, late arrival, technical problems, and access arrangements. Practise using the official familiarization environment through your school so that entering notation, navigating questions, and reviewing responses feel routine.
How to prepare for both assessments
Treat school tasks as preparation for external assessment. After each task, classify errors by criterion: inaccurate mathematics may indicate a knowing-and-understanding weakness, while unsupported generalizations, unclear notation, or unexplained conclusions reveal different problems.
Use this preparation cycle:
- Review concepts through MYP Extended Mathematics lessons.
- Complete targeted questions in the Extended Mathematics Questionbank.
- Rewrite incorrect solutions with complete reasoning.
- Attempt mixed tasks under timed, on-screen conditions.
- Ask your teacher which criterion strand needs attention.
The Extended Mathematics resource hub supports topic review. Students can also compare Standard and Extended Mathematics or examine how MYP marks matter.
Common misunderstandings
An eAssessment mock is not an official IB result, even if it closely reproduces the format. Official on-screen responses are marked by IB examiners, not the student's teacher.
Not every MYP student takes Extended Mathematics eAssessment. External assessment is optional for schools, and registration can vary by candidate. Confirm whether you are registered for one course result, the full certificate, or school-based assessment only.
Conclusion
School-based assessment measures learning throughout the course and is controlled locally. The IB-set assessment is a scheduled, externally marked on-screen examination producing an official result. Confirm procedures with your coordinator, then use RevisionDojo Study Notes, Questionbank, timed practice, and Jojo AI to strengthen your mathematics and examination technique.
Sources and referenced URLs
- IB overview of MYP assessment
- IB MYP on-screen examinations
- IB subjects available for on-screen assessment
- IB eAssessment registration information
- IB guidance on starting with eAssessment
- RevisionDojo Extended Mathematics resources
- RevisionDojo Extended Mathematics lessons
- RevisionDojo Extended Mathematics Questionbank
- Standard versus Extended Mathematics guide
- RevisionDojo guide to MYP marks
