23 Nov Internal Assessment Criteria for IB ESS
Updated for the ESS course first assessed in 2026. The individual investigation is assessed using six criteria, totalling 30 marks, at both SL and HL. The maximum report word count is 3,000.
| Criterion | Marks |
|---|---|
| A: Research question and inquiry | 4 |
| B: Strategy | 4 |
| C: Method | 4 |
| D: Treatment of data | 6 |
| E: Analysis and conclusion | 6 |
| F: Evaluation | 6 |
Use the descriptors to plan evidence
Explain the environmental issue and develop a focused question. Discuss a relevant environmental strategy and tensions between perspectives. Describe and justify a method that can produce relevant evidence.
Present and process data clearly. Explain patterns and answer your question using the evidence, then evaluate limitations and feasible improvements. Strategy is distinct from the investigation method and its evaluation.
Check the current guide
Read the full descriptors in the official IB ESS guide, first assessment 2026. A criterion checklist does not guarantee marks. Follow school guidance about feedback, collaboration and authentication.
Request a FREE 20-minute trial lesson. Include your IB year, SL or HL level, main question, availability and time zone. Your assessed work remains your own.
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