One of the most common misconceptions IB students have about Internal Assessments is that clear explanation equals strong performance. Students often believe that if they explain concepts accurately and in detail, examiners will reward the work highly. Unfortunately, this is not how IA marking works. In many cases, explaining content is exactly what causes marks to be capped.
Understanding why explanation alone is insufficient helps students shift their approach and unlock higher mark bands.
Explanation Shows Knowledge — Not Thinking
Explanation demonstrates that you understand the subject content. This is important, but it is only a baseline requirement.
When students explain content, they usually:
- Define concepts
- Describe processes
- Summarise theories or results
This shows knowledge, but IB IAs are not designed to test knowledge alone. They are designed to test how you use that knowledge.
Examiners Expect You to Go Beyond Explanation
IB examiners assume that students understand the syllabus. What they are looking for is evidence that students can:
- Interpret information
- Apply ideas to a specific context
- Draw meaningful conclusions
When an IA stops at explanation, examiners see competence — but not insight.
Explanation Does Not Answer the Research Question
A key reason explanation loses marks is that it often does not directly answer the research question or aim.
For example:
- Explaining a concept does not show how it affects your investigation
- Describing results does not explain what they mean
- Summarising sources does not justify conclusions
If your writing could exist without the research question, it is probably too explanatory.
