IB Grades Explained: A Parent's Guide to the 1-7 Scale

Navigating the world of IB assessment can feel like learning a new language. Unlike traditional percentage-based systems, the IB uses a 1-7 grading scale that focuses on what a student knows and can do, rather than how they rank against their peers. This guide is designed to help you decode your child's grades and, more importantly, understand the teacher feedback that drives real improvement.

Think of this as your Rosetta Stone for IB assessment. By the end, you'll be able to:

• Understand precisely what each number on the 1-7 scale represents.
• See how individual subject grades combine to form the final score out of 45.
• Translate teacher feedback into actionable steps for your child.
• Shift conversations from "what score did you get?" to "what did you learn from the feedback?".

Part 1: Decoding the IB 1-7 Scale

The first thing to know is that the IB is a "criterion-referenced" system. This means students are measured against a set of predefined standards for each subject. A 7 in Physics in May session exams has the same standard of excellence as a 7 in Physics last November, regardless of how the rest of the cohort performed. This ensures consistency over time, global consistency, and fairness. Here’s what each grade means:

Part 2: The Big Picture - Calculating the Final 45

The famous "45" is the maximum possible score for the IB Diploma. It's a combination of subject performance and the IB Core. Here’s how it adds up:

• Subject Scores (Max 42 points): Each of the six subjects (Standard and Higher Level) is graded on the 1-7 scale. The maximum combined score a student can achieve from their subjects is therefore (6 subjects x 7 points) 42 points.
• The Core (Max 3 Bonus Points): The remaining 3 points come from the Theory of Knowledge (TOK) essay/exhibition and the Extended Essay (EE). These are graded from A to E. The combination of these two grades determines the ''bonus points'', according to the official IB matrix (at least an A and B grade in each is required for the full 3 points).
• CAS (Pass/Fail): Creativity, Activity, Service (CAS) is the third core component. It does not contribute points, but a student must successfully complete all CAS requirements to be awarded the Diploma.

Part 3: Beyond the Numbers - Interpreting Teacher Feedback

A grade is a snapshot in time; the feedback is the roadmap for improvement. IB teachers provide detailed comments that are directly linked to the assessment criteria. Learning to interpret this feedback is the key to growth.

Think TOK to aim for 7: the criteria descriptions for work scoring 7 in any subject often imply concluding assignments like Internal Assessments with the critical thoughts and implications that TOK study in the Areas of Knowledge develops.

Part 4: A Parent's Action Plan for Supporting Growth

Your role is not to be a supplementary teacher, but a supportive coach. Use these strategies to help your child turn feedback into fuel for success.

1. Read the Rubric Together: This is what the examiner will be using. Ask the teacher for the assessment rubric. Sit down with your child and highlight the descriptors for the next level up. This makes the target clear and shows them exactly what "excellent" looks like compared to ''very good''.
2. Look for Patterns: Review feedback from a few different assignments. Is the same point coming up? A recurring comment like "needs more depth" points to a core skill that needs focused practice.
3. Encourage Self-Advocacy: The best person to clarify feedback is the teacher who gave it. Encourage your child not to be shy in discussing their feedback. This can begin with booking a 10-minute meeting to ask questions like, "Could you show me an example of what a more developed analysis looks like here?".
4. Celebrate the Process, Not Just the Score: Praise the effort of redrafting an introduction based on feedback or the courage to try a new lab technique. Emphasising a growth mindset reduces anxiety and builds longer-term learning, plus the resilience needed for the ongoing demands of the IB.