Subject guide
IB History Internal Assessment guide
Written and cross-checked by IB Diploma graduates: Alexander (41), Alejandro (40), Martina (40), Victoria (38), Martin (35), Maria (34)
· Checked against official IB guidance · Editorial policy
The IB History Historical Investigation (IA) is graded against 3 IB assessment criteria worth 25 marks. This guide explains the mark scheme for each criterion and what the published criteria reward at each score level at Higher Level (HL) and Standard Level (SL).
IB assessment criteria
Each criterion is presented independently using the configured mark-band descriptors for this subject and assessment session.
| Criterion | Name | Marks |
|---|---|---|
| Identification and Evaluation of Sources | Identification and Evaluation of Sources | 6 |
| Investigation | Investigation | 15 |
| Reflection | Reflection | 4 |
| Total | 25 | |
Criterion-by-criterion breakdown
Identification and Evaluation of Sources
Identification and Evaluation of Sources
What this criterion assesses
A clearly focused research question. Appropriate, relevant sources identified with their relevance explained. Detailed analysis and evaluation of two sources, with explicit discussion of their value and limitations with reference to origin, purpose and content.
Mark band descriptors
Criterion A: Identification and evaluation of sources (0–6): - 0: The work does not reach a standard described by the descriptors below. - 1–2: The student states a research question, but it may not be appropriate or clearly focused. Sources are identified but their relevance to the investigation is not explained. There is little or no analysis or evaluation of the value and limitations of the sources. - 3–4: The student states an appropriate research question. Relevant sources are identified and selected, with some explanation of their relevance. There is analysis and evaluation of two sources, but the references to origin, purpose and content are partial or implicit; value and limitations are stated but not fully developed. - 5–6: The student states an appropriate, clearly focused research question. Appropriate and relevant sources are identified and selected, and their relevance to the investigation is clearly explained. There is detailed analysis and evaluation of two sources, with explicit and well-developed discussion of their value and limitations with reference to the origins, purpose and content of the two sources.
Common mistakes
- Research question too broad, or not clearly stated
- Value and limitations not tied to origin, purpose and content
- Summarising the sources instead of evaluating them
- Choosing sources that are hard to evaluate (e.g. general textbooks)
Investigation
Investigation
What this criterion assesses
A clear, coherent and well-organized investigation with critical analysis supported by relevant, well-chosen evidence from a range of sources. Different perspectives are evaluated, leading to a reasoned conclusion that is consistent with the evidence.
Mark band descriptors
Criterion B: Investigation (0–15): - 0: The work does not reach a standard described by the descriptors below. - 1–3: The investigation lacks clarity and organization. There is little or no evidence that sources have been used. The material is mainly narrative or descriptive. There is no analysis, and no conclusion or a conclusion not based on the evidence presented. - 4–6: The investigation shows some organization. Some relevant evidence is included, but the sources are not used effectively. There is limited analysis. There is some attempt at a conclusion. - 7–9: The investigation is generally clear and organized but may lack coherence. Relevant evidence from a range of sources is included and used. There is some analysis and some critical use of sources. A conclusion is offered that is consistent with some of the evidence. - 10–12: The investigation is clear, coherent and effectively organized. Relevant and well-chosen evidence from a range of sources is used effectively to support the argument. There is analysis and critical evaluation of sources, and a reasoned conclusion consistent with the evidence is presented. - 13–15: The investigation is clear, coherent and effectively organized. There is a critical analysis that is well supported by relevant, well-chosen evidence from a range of sources. Different perspectives are evaluated. The argument is convincing and sustained, leading to a reasoned conclusion that is consistent with the evidence and arguments presented.
Common mistakes
- Narrative or descriptive writing instead of analysis
- Conclusion not supported by the evidence presented
- Sources listed but not critically used in the argument
- Different perspectives or interpretations not considered
Reflection
Reflection
What this criterion assesses
Reflection focused on what the investigation revealed about the methods used by, and the challenges facing, historians. An explicit connection between the reflection and the rest of the investigation, supported by specific examples.
Mark band descriptors
Criterion C: Reflection (0–4): - 0: The work does not reach a standard described by the descriptors below. - 1–2: The reflection is mainly descriptive or general. It demonstrates limited awareness of what the investigation highlighted about the methods used by, or the challenges facing, the historian. The connection between the reflection and the rest of the investigation may be unclear. - 3–4: The reflection is clearly focused on what the investigation highlighted about the methods used by, and the challenges facing, the historian. It demonstrates a clear and explicit connection between the reflection and the rest of the investigation, with reference to specific examples (such as the nature of the sources used, or the value and limitations of particular types of evidence).
Common mistakes
- Reflecting on personal effort instead of the historian's methods
- Generic comments not linked to the investigation
- No specific examples drawn from the investigation
- Reflection reads as a second conclusion rather than methodological
Sources & verification
Primary-source references used to verify key assessment facts on this page. Last source check: September 22, 2026.
The exact subject guide for History is the authority for the task, criteria and limits. Some IB subject guides do not have a stable public URL, so this page names the configured assessment session and links the official IB update hubs instead of fabricating a direct source link.
- IB — Diploma Programme assessment and examsOfficial overview of criterion-related assessment and internal assessment in the Diploma Programme.
- IB — current curriculum updatesOfficial update hub for subject and first-assessment changes. Use it to confirm that your exam session matches the criteria shown here.
Ready to get feedback on your History Historical Investigation (IA)?
Upload your draft and get criterion-by-criterion feedback using the configured History criteria for this assessment session.
Get History feedback →Stop reading about it
Upload your draft and get criterion-by-criterion feedback in minutes.
