IB Physics IA Grader — Free AI Feedback on Your Lab Report
IBLens grades your IB Physics Internal Assessment against the official IB Physics IA rubric — criterion by criterion — in 60 seconds. Get feedback on your exploration, data analysis, uncertainty propagation, and evaluation. First analysis is free.
IB Physics IA rubric (24 marks)
- Personal Engagement (2 marks): A specific personal connection to the physics investigation — not a generic statement about enjoying physics.
- Exploration (6 marks): A focused, measurable research question; clearly identified variables; a sound, safe experimental design.
- Analysis (6 marks): Correct data presentation with appropriate significant figures, uncertainty analysis, and linearisation of graphs where required.
- Evaluation (6 marks): Critical evaluation of your method and results, comparison to accepted theoretical values, and specific, realistic improvements.
- Communication (4 marks): Correct use of SI units, scientific notation, and clear diagram labels.
Common IB Physics IA mistakes IBLens catches
- Linearisation not attempted: For non-linear relationships (e.g., period vs length), Physics examiners expect you to linearise your graph (e.g., T² vs L). Not doing this limits your Analysis score.
- Percentage error vs percentage uncertainty: Confusing percentage error (deviation from theory) with percentage uncertainty (precision of measurement). These are different calculations serving different purposes.
- No comparison to literature value: Your Evaluation section should compare your experimental value to a known theoretical or literature value and calculate the percentage error.
- Research question too qualitative: "How does temperature affect resistance?" needs to specify the range and units: "How does temperature (20°C–80°C) affect the resistance (Ω) of a nichrome wire?"
Frequently asked questions
- Is the Physics IA grader free?
- Your first analysis is completely free. Additional analyses cost $4.99 each.
- Can I paste only part of my IA?
- Yes — but for criterion-by-criterion feedback, paste your full report for the most accurate score prediction.