Your Internal Assessment,
criterion by criterion
The Internal Assessment accounts for 20–30% of your final IB grade. Approach it with the right framework and you can bank marks before the exam room.
See all IB core supportThe IA assessment criteria
24 marks in total. This is what examiners look for under each criterion.
Personal engagement
2 marksEvidence that the student has taken intellectual initiative in choosing the topic and demonstrates genuine interest throughout the work.
Exploration
6 marksA focused research question with appropriate methodology, clear variables, and sufficient data range to support meaningful analysis.
Analysis
6 marksCorrect processing of data with appropriate mathematical or scientific techniques. Discussion of uncertainties and limitations.
Evaluation
6 marksComparison of results to accepted values, identification of weaknesses, and realistic suggestions for improvement.
Communication
4 marksClear and structured presentation with a coherent argument. Meets the 6–12 page requirement with an accurate bibliography.
The IA in each subject
Mathematical exploration
e.g. 'Modelling real-world data with polynomial regression'
Experimental investigation
e.g. 'Measuring the refractive index of glass using Snell's Law'
Scientific investigation
e.g. 'How concentration affects enzyme activity in catalase'
Commentary portfolio
e.g. 'Impact of an import tariff on domestic steel producers'