QCE internal assessments (IAs) vs external assessment (EA)
In each QCE General subject, your Units 3 and 4 result comes from three internal assessments (IA1 to IA3) set and marked by your school and one external assessment (EA) set and marked by QCAA. The EA is worth 50% in Mathematics and Science subjects and 25% in all other General subjects, and QCAA says the EA result does not scale your internal results. Applied subjects have no QCAA external assessment.
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The four assessments
For each General subject in Units 3 and 4 you complete:
- IA1, IA2 and IA3: set and marked by your school against QCAA's syllabus, on dates your school sets across the two units;
- the EA: common to all schools, sat at the same time under the same conditions, and developed and marked by QCAA. The EA period is in Term 4.
The form of each IA depends on the syllabus: for example examinations, investigations, reports, extended responses, performances or projects.
How much each part is worth
| Subject group | Internal (IA1 to IA3) | External (EA) |
|---|---|---|
| Mathematics and Science General subjects (for example Mathematical Methods, Specialist Mathematics, General Mathematics, Biology, Chemistry, Physics, Psychology) | 50% | 50% |
| All other General subjects (for example English, Literature, Modern History, Economics, Legal Studies, Geography) | 75% | 25% |
Each syllabus sets how the internal 50% or 75% is split between IA1, IA2 and IA3. Check your subject's syllabus or your school's assessment schedule.
How internal assessment is quality-assured
QCAA runs two separate checks:
- Endorsement. Before use, your school's assessment instruments are checked against the syllabus requirements.
- Confirmation. After marking, QCAA reviews a sample of student responses to confirm the school's marks, and can change them if they don't match the syllabus standards.
The external assessment is a separate component: QCAA states that the EA result does not scale the internal assessment result.
Applied subjects
Applied subjects are assessed internally, with no QCAA external assessment, and results are reported as A to E grades. One Applied subject (or one completed Certificate III or higher) can be among the five inputs to your ATAR. See how the QCE ATAR is calculated.
What this means for your preparation
- In Mathematics and Science subjects, the EA is half your result. Plan revision across both units for a single exam.
- In other General subjects, the IAs are three-quarters of your result. Each IA is a major piece of assessment, not practice.
- Use IA feedback. Marking guides are specific to each instrument, but feedback on how you're judged against the criteria carries forward.
Step 1: a Mathematical Methods student
Suppose the internal assessments total 40 out of 50 and the EA is 35 out of 50.
Step 2: add them
The result is 75 out of 100. Because the EA is half the result in a Mathematics subject, a weaker exam pulls the result down more than it would in a 25% subject.
Step 3: compare with a 75/25 subject
A Legal Studies student with internal results of 60 out of 75 and an EA of 15 out of 25 also gets 75 out of 100, but the exam carries a quarter of the weight.
Assuming every subject is 75% internal. Mathematics and Science General subjects are 50/50.
Sources & how we know this
- About external assessment — Queensland Curriculum and Assessment Authority (QCAA) (2026)
- Assessment and results (internal assessment, quality assurance) — Queensland Curriculum and Assessment Authority (QCAA) (2026)
- ATAR Report 2025 (how Applied and General results are scaled) — Queensland Tertiary Admissions Centre (QTAC) (2026)
Last updated: 2026-09-23. Rules change. For the official source see QCAA.