IB Biology Extended Essay Grader
- Lots of students struggle to decode their Biology Extended Essay grade and assessment.
- This is a free grading tool that breaks down the IB Biology EE rubric into plain English, so you understand exactly where your 4,000-word research project stands across all five assessment criteria.
- The embedded grader makes self-evaluation faster and more accurate than manual rubric checking, so you're never left guessing.
Note
The grader works in two modes:
- Draft Mode: Quick assessment of your work-in-progress. Input your current sections and get instant feedback on which criteria need more work before you finish writing.
- Full Mode: Complete evaluation of your finished EE. Input your final project details across all criteria and get a comprehensive grade breakdown with specific improvement suggestions for each section.
Quick Start Checklist
- Before using the grader, ensure you understand these key elements:
- Research Question - Clear, focused biological question that can be answered through secondary research and analysis
- Biological Focus - Must be firmly based on accepted biological theory from molecular to ecosystem level
- Academic Sources - Minimum 15-20 credible sources including peer-reviewed journals, research papers, and scientific publications
- Scientific Analysis - Critical evaluation of biological evidence with data interpretation and theory application
- Word Count Verification - Maximum 4,000 words (excluding bibliography, footnotes, and appendices)
- Complete Structure - Introduction, Investigation, Analysis, Conclusion, Bibliography, and Reflections
- Supervisor Meetings - Evidence of 3 mandatory reflection sessions with your EE supervisor
- Ethical Considerations - Discussion of ethical implications where relevant to biological research
Rubric Breakdown
Criterion A: Focus and Method (6 marks)
- This criterion tests how clear and focused your biological research question is.
- It evaluates whether your methodology is appropriate for biological investigation.
Mark Band | What It Means | Evidence You Must Show |
---|---|---|
0 | No clear focus or method | Research question unclear or not biology-related |
1-2 | Limited focus and method | Basic research question with minimal methodology explanation |
3–4 | Adequate focus and method | Clear biology-related question with appropriate research methodology |
5-6 | Excellent focus and method | Sharply focused biological question with sophisticated research approach maintained throughout |
Criterion B: Knowledge and Understanding (6 marks)
- This evaluates your grasp of biological concepts and scientific knowledge.
- It tests how well you apply biological theory and demonstrate subject expertise.
Mark Band | What It Means | Evidence You Must Show |
---|---|---|
0 | No relevant knowledge | No connection to biological theory or concepts |
1-2 | Limited knowledge | Basic understanding with minimal scientific application |
3-4 | Good knowledge | Clear understanding with appropriate biological terminology |
5-6 | Excellent knowledge | Sophisticated understanding with expert use of biological concepts and terminology |
Criterion C: Critical Thinking (12 marks)
- This is the most important criterion - worth 35% of your total grade.
- It assesses your ability to analyze biological data, evaluate scientific evidence, and synthesize findings.
Mark Band | What It Means | Evidence You Must Show |
---|---|---|
0 | No critical thinking | Purely descriptive, no scientific analysis |
1-3 | Limited critical thinking | Some analysis but mainly descriptive |
4-6 | Adequate critical thinking | Clear analysis with some scientific evaluation |
7-9 | Good critical thinking | Strong analysis and evaluation of biological evidence |
10-12 | Excellent critical thinking | Sophisticated analysis with original biological insights and balanced scientific evaluation |
Criterion D: Presentation (4 marks)
- This assesses professional presentation and academic formatting.
- It includes structure, scientific communication, and adherence to academic conventions.
Mark Band | What It Means | Evidence You Must Show |
---|---|---|
0 | Poor presentation | Unclear structure, poor formatting |
1-2 | Adequate presentation | Generally clear with some formatting issues |
3-4 | Excellent presentation | Professional structure, clear formatting, proper citations |
Criterion E: Engagement (6 marks)
- This tests your personal engagement with the biological research process.
- It's based on your reflection sessions and demonstrates your intellectual development.
Mark Band | What It Means | Evidence You Must Show |
---|---|---|
0 | No engagement | Minimal reflection, no evidence of personal involvement |
1-2 | Limited engagement | Basic reflection with some personal connection |
3-4 | Good engagement | Clear reflection showing intellectual development |
5-6 | Excellent engagement | Sophisticated reflection demonstrating deep personal engagement |
How to Interpret Your Grade from the Tool
- The embedded grader calculates your total score out of 28 marks across all criteria except E, your reflections.
- Here's how to interpret your results:
- 24-28 marks (Grade A territory): Excellent work with sophisticated physics research. Minor refinements needed.
- 19-23 marks (Grade B range): Strong project with good physical analysis. Focus on critical evaluation and chemical theory synthesis.
- 14-18 marks (Grade C level): Competent work meeting basic requirements. Strengthen physical analysis and evidence evaluation.
- 9-13 marks (Grade D range): Adequate foundation but needs significant improvement. Review research focus and physical understanding.
- Below 9 marks (Grade E): Major revision required across most criteria. Restructure approach and strengthen biological fundamentals.
Tip
If you're between bands, focus on Criterion C (Critical Thinking) - it offers the biggest impact for improvement.
Grade Boundaries & Converting Your Mark
IB Extended Essay grade boundaries are consistent across subjects but can vary slightly by session:
IB Grade | Mark Range (out of 34) | Percentage | Description |
---|---|---|---|
A | 27-34 | 79-100% | Excellent |
B | 21-26 | 62-76% | Good |
C | 14-20 | 41-59% | Satisfactory |
D | 7-13 | 21-38% | Mediocre |
E | 0-6 | 0-18% | Elementary |
Tip
- Grades D or E in your EE mean you cannot receive the IB Diploma, regardless of other grades
- Your EE grade combines with TOK to contribute up to 3 bonus points to your total IB score.
Subject-Specific Tips
- Molecular Biology Focus:
- Investigate protein function, genetic regulation, enzyme kinetics, or metabolic pathways.
- Include biochemical mechanisms and molecular interactions in your analysis.
- Ecology & Environmental Biology:
- Focus on species interactions, ecosystem dynamics, conservation strategies, or environmental impacts.
- Use quantitative ecological data and statistical analysis from published studies.
- Cell Biology & Physiology:
- Examine cellular processes, organ system function, homeostasis, or disease mechanisms.
- Include physiological data and experimental evidence from research literature.
- Evolutionary Biology:
- Analyze evolutionary mechanisms, phylogenetic relationships, adaptation strategies, or speciation processes.
- Use comparative studies and molecular evidence to support arguments.
- Biotechnology & Applied Biology:
- Investigate biotechnological applications, medical advances, agricultural innovations, or bioethics.
- Include current research, practical applications, and societal implications.
Common Mistake
And quick fixes
- Too broad research question → Focus on specific biological processes or organisms with clear scope
- Insufficient scientific sources → Use minimum 15-20 peer-reviewed papers and current research (within 5 years)
- Purely descriptive content → Include critical analysis, data evaluation, and scientific synthesis
- Weak biological theory application → Connect findings to molecular mechanisms, evolutionary principles, or ecological concepts
- Poor methodology explanation → Clearly explain your research approach and source selection criteria
- Missing ethical considerations → Address ethical implications of biological research where relevant
- Inadequate scientific communication → Use proper biological terminology and clear scientific language
- Word count violations → Stay within 4,000 words; only first 4,000 words are marked
- Generic conclusions → Base conclusions on specific biological evidence and scientific analysis
- Poor academic referencing → Use consistent citation style and credible scientific sources
If You're Between Bands or Uncertain:
- Review Specific Criteria: Identify which criteria have lower scores and focus on improving those areas.
- Seek Feedback: Consult with your supervisor or peers to gain insights into areas needing enhancement.
FAQs
- Can I conduct original experiments for my Biology EE?
- Not recommended - focus on literature review and secondary data analysis rather than primary experimentation.
- How current should my sources be?
- Prioritize recent research (within 5 years) for rapidly evolving fields like molecular biology and biotechnology.
- Should my EE connect to my IA topic?
- No, avoid overlap - choose a different biological focus or research approach for your EE.
- What level of biological detail is expected?
- Include molecular-level explanations where relevant, but ensure accessibility to educated non-specialists.
- How important are diagrams and figures?
- Very important - include scientific diagrams, data graphs, and concept illustrations to support your analysis.
- Can I focus on human biology and medicine?
- Yes, medical applications and human physiology are excellent topics with rich research literature.
- Should I include statistical analysis?
- Where relevant - analyze quantitative data from studies but avoid complex statistics unless necessary.
- How detailed should my methodology section be?
- Explain your research strategy, source selection criteria, and analytical approach clearly.
- Can I use textbooks as primary sources?
- Sparingly - prioritize primary research papers and peer-reviewed journals over textbooks.
- What makes a Biology EE stand out?
- Current scientific relevance, sophisticated analysis, clear biological understanding, and original synthesis of research findings.
Use the Free Biology Extended Essay Grader Now
- Stop guessing about your grade.
- The comprehensive grading tool evaluates your EE against all five official criteria, giving instant feedback on strengths and improvement areas.
- Input your project details and get a preliminary grade calculation that helps you focus revision efforts where they matter most.
- Biology-specific analysis helps you master the scientific research and critical evaluation that separate excellent from average Biology Extended Essays.