Use this rubric when students are writing a short extended response that explains a biological process, such as photosynthesis, homeostasis, inheritance, vaccination, or the immune response.
This page offers an example rubric for a 6-mark scientific explanation. It keeps the final mark holistic, while making the main judgement points visible: scientific accuracy, terminology, logical sequencing, and application to the question context.
TA39 drafts from the rubric you choose; you review, adapt, and decide what fits your assignment.
At a Glance
| Field | Details |
|---|---|
| Level | Cambridge IGCSE / upper secondary, depending on system |
| Subject Area | Biology / Science |
| Task Type | Extended response scientific explanation |
| Useful For | 6-mark biology explanations, topic-based extended responses, practice responses before a paper or unit assessment |
| Framework / Curriculum Reference | Cambridge IGCSE Biology 0610 / 0970 assessment style |
| Scoring Model | Holistic 0-6 mark guide, supported by four diagnostic lenses |
| Reference Notes | Framework references are included for context. Teachers should adapt this example to their current curriculum, assessment policy, and assignment expectations. |
What This Rubric Covers
- Explaining the correct biological ideas and key points
- Using scientific terminology accurately
- Sequencing ideas so cause and effect are clear
- Applying knowledge to the specific question, data, experiment, or scenario
- Using a best-fit final mark rather than adding several separate scores
Download
For easier reuse, the rubric and scoring summary are packaged as a separate Markdown file inside this zip:
Rubric
Final mark: ___ / 6
Use the diagnostic lenses below to read the response carefully. Then assign one final best-fit mark out of 6 using the mark guide that follows.
Diagnostic Lenses
| Diagnostic Lens | What to Look For | Teacher Evidence |
|---|---|---|
| Scientific Accuracy and Content | The response includes the essential biological ideas for the question and explains them correctly. Major misconceptions are absent. | Correct key points, accurate process explanation, few or no factual errors, topic-specific details included. |
| Scientific Terminology | Subject vocabulary is used accurately and in context. Technical terms help the explanation rather than replacing it. | Appropriate use of topic-specific vocabulary such as gene, allele, genotype, phenotype, chlorophyll, enzyme, stimulus, or response. |
| Logical Structure and Sequencing | The explanation follows a clear order. Steps, causes, effects, and relationships are easy to follow. | Clear sequence, cause-effect links, connected sentences, no major gaps or confusing jumps in the process. |
| Application and Context | The response answers the exact question, not just the general topic. It applies knowledge to the data, experiment, diagram, scenario, or command word. | Relevant examples, links to the given context, use of evidence from a diagram, table, or experiment where applicable. |
Performance Conversion
| Mark | Response Quality |
|---|---|
| 6 | Comprehensive, accurate explanation covering all essential key points, with precise terminology, clear sequencing, and direct application to the question context. No significant errors. |
| 5 | Thorough explanation that includes most key points. Terminology and structure are generally strong. Minor errors or gaps may be present but do not weaken the overall explanation. |
| 4 | Good explanation covering several key points, with adequate terminology and mostly logical structure. Some gaps, weak links, or minor sequencing issues are evident. |
| 3 | Partial explanation with some correct biological ideas, but noticeable gaps, uneven terminology, limited structure, or weak application to the question. |
| 2 | Limited explanation with few relevant key points. Scientific terminology may be weak or inaccurate, and the response shows little application to the context. |
| 1 | Minimal relevant content. The response may include one or two isolated correct points but shows very limited understanding of the biological process. |
| 0 | No creditworthy content. The response is irrelevant, consistently incorrect, or not attempted. |
Teacher Adaptation Notes
- Add the topic-specific key points before using this rubric with a class.
- Use the command word in the question to decide how much explanation, application, or evidence is expected.
- If a school or exam board mark scheme is available, use that mark scheme as the authority and adapt this rubric to match it.
- Do not add the four diagnostic lenses into a 24-mark total. They are there to support one final mark out of 6.
Standards and Framework References
The framework reference below is included for context. Cambridge assessment practice often uses mark schemes and best-fit bands. Teachers should adapt this example to the syllabus, paper, topic, and mark scheme they are using.
| Reference | How It Connects to This Rubric |
|---|---|
| Cambridge IGCSE Biology 0610 | Useful context for Biology syllabus expectations, assessment objectives, extended-response practice, and topic-specific mark schemes. |
Source and Attribution
This example is based on a Cambridge IGCSE Biology extended-response rubric document prepared for TA39 rubric-library work and has been formatted for teacher review and adaptation in TA39.
This page is not an official Cambridge assessment document and does not imply endorsement by Cambridge University Press & Assessment, Cambridge International Education, or any Cambridge-affiliated body.
Teachers should check the current syllabus, guide, school policy, or mark scheme before using or adapting this example.
Want to Build or Adapt a Different Rubric?
You can adapt this structure for a different assignment by keeping the scoring model clear, naming the criteria that matter most, and replacing the descriptors with language that matches the work students will actually submit.
TA39 can help turn a rubric or reference document into a format you can review and adapt. You still review the criteria, adjust the wording, and decide whether it fits your assignment.