How to Write a Strong IB Internal Assessment (IA) in Any Subject
IB Strategy
IBInternalAssessmentGuide:Process,Ev
StudyIB video guide · 10 min
Plan an IB Internal Assessment from the subject guide: confirm the task and criteria, collect authentic evidence, analyse it and review academic integrity.
Quick answer: There is no universal IB IA formula. First identify the applicable subject guide, assessment session, task and criteria. Then design a process that produces authentic evidence for those criteria, analyse that evidence, evaluate the limits of the result and complete an authorship and referencing check.
Why one IA template cannot fit every subject
The IB's assessment overview describes internal or teacher-assessed work in different forms, including oral work in languages, fieldwork in geography, laboratory work in the sciences, investigations in mathematics and artistic performance. In most subjects, work completed during the course is either externally assessed or marked by the teacher and then externally moderated.
This means the words IA, investigation and coursework do not guarantee the same structure, word limit, criteria or weighting. A science report cannot be used as a universal model for an oral, performance, fieldwork task or mathematical exploration.
Confirm before planning
Where to verify it
Exact subject, route and level
Course registration and current subject guide
First assessment year and session
Cover and assessment section of the applicable guide
Assessed task and required format
Internal assessment details
Criteria and command terms
Current criterion descriptors and clarifications
Weighting, duration and limits
Assessment outline and task instructions
Permitted teacher or tool support
Teacher, school policy and academic-integrity rules
A seven-step IB IA process
1. Build a one-page requirement sheet
Before choosing a topic, record the exact task, criteria, format, limit, deadline, checkpoints, safety or ethical requirements and referencing convention. Add the guide version and URL so an older template cannot silently become the authority.
If a requirement is unclear, ask a narrow question such as “Which assessment guide applies to our May 2027 session?” or “Does this table count toward the stated limit?”
2. Define a question or objective that the task can answer
A useful question is specific enough to guide evidence collection but substantial enough to address the criteria. Test it against four constraints:
the task actually permits this form of inquiry;
relevant evidence can be collected or selected lawfully and safely;
the available time and tools support meaningful analysis; and
the result can be interpreted without pretending it proves more than the method allows.
Subject-specific language matters only when it makes the reasoning more precise. Adding syllabus terms decoratively does not create analysis.
3. Design the evidence before collecting it
Map every major method decision to the question and criteria. Depending on the subject, this can mean selecting texts or extracts, defining variables and controls, planning a sampling method, choosing mathematical techniques, documenting a creative process or preparing an oral line of inquiry.
Record why each decision is appropriate. Also identify permissions, privacy, environmental impact, safety and the risk of bias before the action phase rather than adding them after the outcome is known.
4. Preserve an authentic process record
Keep dated notes of source searches, discarded options, raw observations or data, changes to the method, teacher meetings and analytical decisions. Do not alter original evidence to make the final result look cleaner. Label later corrections and retain enough provenance to explain where every important claim or value came from.
This record supports accurate reflection and helps distinguish the student's work from copied, duplicated or externally created material.
5. Analyse for the actual criterion
Description reports what is present; analysis explains what the evidence means for the question. Use the method appropriate to the subject and show the reasoning between evidence and conclusion.
A practical paragraph or section test is:
What evidence is being used?
What pattern, relationship, choice or implication is identified?
How was that interpretation reached?
How does it answer part of the question or criterion?
What uncertainty or alternative interpretation remains?
Do not import statistical language, literary terminology or scientific error labels from another subject unless they are appropriate to this task and evidence.
6. Conclude and evaluate within the evidence
Answer the research question or task directly, then state how far the evidence supports that answer. An evaluation should identify limits that actually arise from the method, data, sources, assumptions or scope and explain why they matter. Proposed improvements should address those causes and remain feasible.
There is no universal rule that every IA needs the same number of weaknesses or a separate “reflection paragraph”. Follow the applicable descriptors.
7. Complete a final criteria and integrity audit
Create a table with one row per criterion. In the next columns, identify the page, timestamp or section containing the evidence, one unresolved weakness and the revision action. This is more reliable than repeatedly reading the whole submission and deciding it “looks finished”.
Then verify:
every quotation, idea, image, dataset and borrowed method is traceable;
the work is not duplicated from another assessed component;
collaboration has not become collusion or shared authorship;
permitted external or AI assistance is acknowledged as required;
the evidence, analysis and final wording remain the student's own; and
the submission meets the exact format and limit for this task.
Useful formative feedback points to a missing explanation, unsupported claim, unclear method or criterion that needs stronger evidence. It should leave the student to decide and make the revision. Feedback that rewrites substantial passages, supplies analysis or creates the investigation can undermine authorship even when the student edits the output later.
Use StudyIB's IB Internal Assessment process guide to review a student-written draft and identify revision priorities. It is not an official IB grade and must be used within school rules.
Use the IB command terms guide alongside the definitions in the applicable subject guide.
StudyIB is an independent learning platform and is not affiliated with or endorsed by the International Baccalaureate Organization. Always confirm assessment requirements with the school and the current official guide.
IB Internal Assessment FAQs
What is an IB Internal Assessment?
Internal assessment is subject-specific work completed during the course. Depending on the subject, an in-school task may be externally assessed or marked by the teacher and externally moderated. Its format, criteria and contribution to the subject grade come from the applicable course guide.
Does every IB IA use the same structure and criteria?
No. IB internal assessment can include oral work, fieldwork, laboratory investigations, mathematical investigations and artistic performance. Use the current guide for the exact subject, level and assessment session instead of applying a universal IA template.
How much is an IB IA worth?
There is no universal weighting across all IB subjects. Check the current assessment outline for the exact course and level. A percentage quoted for one subject, such as the current Chemistry scientific investigation, should not be transferred to another subject.
What is the word limit for an IB IA?
There is no single IA word limit because the assessed task varies by subject and may not even be a written investigation. Confirm the current task requirements and what is included in any limit with the subject guide and teacher.
Can IB students use AI for an IA?
Only within the task, school and teacher rules. AI must not replace the student's research decisions, evidence, analysis or authorship. Any permitted AI-generated material used in assessed work must be acknowledged in the required way, and students should ask before using it.
Can the same work be used for an IA and Extended Essay?
No. The IB academic integrity policy treats duplication of work as misconduct. A related subject area does not authorize reusing the same research, data, argument or writing across assessed components; discuss possible overlap with both supervisors before proceeding.
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