This criterion assesses the level, accuracy, and relevance of the mathematics used. Your mathematics should be appropriate for Math AA and applied correctly throughout the exploration. Procedures must be clearly explained and linked to the research question. High-scoring work uses sufficiently sophisticated mathematics, demonstrates understanding, and contributes meaningfully to answering the investigation’s central question.
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The IB Math AA Internal Assessment can feel overwhelming, but understanding the criteria and checklist makes the process far more manageable. From mathematical communication to personal engagement and reflection, each criterion targets specific skills the IB expects you to demonstrate. In this post, we break down exactly what examiners look for and provide a clear checklist to help you stay focused and maximize your marks.
Math AA IA Criteria and Checklist
The Math AA IA is graded out of a total of 20 points, as per the following criteria.
Criterion A: Presentation - 4 points
The first criterion assesses the organization and coherence of the exploration. It has to be logically developed and easy to follow. The structure should include an introduction, body, and conclusion linked to each other. Relevant graphs, tables, and diagrams should accompany the work in the appropriate place and not be attached as appendices to the document. Also, make sure that you don't repeat or show irrelevant calculations and other elements.
For a maximum of 4 points:
Introduce the topic, give brief context, and clearly state a focused research question that guides all mathematical exploration and conclusions.
Organise the IA into clear sections that follow a logical progression from method selection, calculations, analysis, and finally to interpretation and conclusion. The IA should have a clear introduction, body, and conclusion.
The graphs, tables, and diagrams are present in appropriate places. Only large tables (raw data) or additional diagrams/graphs are attached as appendices.
Use consistent fonts, spacing, headings, and equation formatting so the work looks professional and easy for examiners to follow.
The use of technology is clearly indicated and explained.
Refer to this IA for a brief overview of the matter.
Criterion B: Mathematical communication - 4 points
To score high in this criterion, you must use appropriate mathematical language, including notation, symbols, and terminology. Define key terms and variables where required and use deductive methods to set out proofs. Support your investigation by including various forms of mathematical representation such as formulae, diagrams, tables, charts, graphs, or models - label them appropriately! Calculator and computer notation are acceptable only if the output is software-generated.
For a maximum of 4 points:
Accurate and consistent mathematical notation, symbols, and terminology are employed throughout the report.
All key terms, variables, and concepts are defined and clarified upon first use.
Various forms of mathematical representation - such as formulae, diagrams, tables, charts, graphs, and models are included and appropriately labelled.
Titles, labelled axes, scales, and units are included where appropriate so graphical representations can be understood without additional explanation.
The precision level is indicated for rounded values.
All mathematical calculations are accompanied by explanations, and any presentation of data is thoroughly described. Computer notation is included only if it is software-generated.
When using calculators or software, results are interpreted in words instead of simply pasting screenshots or tables without explanation.
This exemplar demonstrates good mathematical communication.
Criterion C: Personal engagement - 3 points
Personal engagement includes thinking independently and presenting mathematical ideas in your own way. This criterion measures how personally meaningful and original your exploration is. You should show why you chose the topic, how you made decisions, and how you adapted your approach based on results. Personal engagement is demonstrated through thoughtful reflection, creative approaches, and independent thinking. Examiners look for evidence that you took ownership of the investigation rather than following a standard template or choosing a generic topic.
For a maximum of 3 points:
Explain why the topic interests you personally or academically, linking it to experiences, curiosity, or future goals where appropriate.
Show that you selected models, methods, or approaches yourself rather than following a template or purely teacher-directed structure.
Describe how you adjusted your approach when encountering errors, unexpected results, or better alternative mathematical strategies.
Use self-collected data to demonstrate the originality of the investigation.
Comment on difficulties faced and how you overcame them, showing growth and a deeper understanding of the topic.
Check out this IA.
Criterion D: Reflection - 3 points
Reflection evaluates how well you interpret results and consider the implications of your findings. You should explain what your results mean, discuss the limitations of your model or method, and suggest realistic improvements or extensions. Strong reflection goes beyond summarizing results and instead evaluates the effectiveness of the mathematics used. This shows critical thinking and awareness of how mathematics applies to real or theoretical contexts.
For a maximum of 3 points:
Explain what your final values, graphs, or models mean in relation to the original research question and real-world or theoretical context.
A final evaluation, including an analysis of both the strengths and weaknesses of the exploration and suggestions for improvements, is included in the work.
Assess whether chosen techniques were appropriate and efficient, and explain whether other methods might have produced better results.
Rounding, data uncertainty, or measurement errors and how these could influence final answers or trends are discussed.
Potential extensions to the study are presented, including collecting more data, using stronger models, or exploring related questions.
The evaluation ties back to the initial objectives of the exploration.
See here for evidence of good reflection.
Criterion E: Use of mathematics: SL - 6 points
For a maximum of 6 points:
Relevant mathematics commensurate with the level of the SL course is used. Any mathematics extending beyond the syllabus is clarified.
The mathematics explored is correct and error-free.
Thorough knowledge and understanding are demonstrated without any shortcuts. All calculations are provided with explanations.
Unnecessarily complex mathematics is avoided.
Criterion E: Use of mathematics: HL - 6 points
The mathematics explored should be part of the HL syllabus or at its level. Precise mathematics means that it is error-free and uses an appropriate level of accuracy at all times. Sophistication is understanding and using challenging mathematical concepts, looking at a problem from different perspectives and seeing underlying structures to link different areas of mathematics. For your investigation to demonstrate rigor it must involve clarity of logic and language when making mathematical arguments and calculations. Make sure that the claims relevant to the development of the exploration are justified or proven. Keep in mind that if you are using technology, just substituting values into a formula does not necessarily demonstrate understanding of the results and is likely to result in a deduction of points.
For a maximum of 6 points:
The mathematics used is part of the HL syllabus or at a similar level. Any mathematics extending beyond the syllabus is clarified.
Mathematics is error-free and uses appropriate approximation at all times.
Sophistication is shown by using challenging mathematical concepts, looking at a problem from different perspectives, or linking different areas of mathematics together.
Unnecessarily complex mathematics is avoided.
Mathematical claims relevant to the investigation are justified or proven.
You can refer to this SL exemplar and HL exemplar.
We hope this post has helped you learn more about the Math AA IA criteria and checklist. For more useful materials associated with the IB, check out the wide variety of IA, EE and TOK exemplars available at Clastify and other guides available on our blog.
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