
Complete Guide to IB Internal Assessments (IAs)
Understand IB Internal Assessments (IAs) and grading: learn how your teacher's guidance and the moderation process lead to your final, fair IB grade.
Understanding IB Internal Assessments (IAs)
The IB is full of acronyms – TOK, IA, EE, and CAS just to name a few! Sometimes it’s difficult to keep track of what all of them mean. One in particular, the Internal Assessment, seems to cause confusion for many students. Both students who haven’t started the IB yet as well as current IB students often do not have a full understanding of what an IA really is. In this blog, we’ll break down what Internal Assessments are about!
What is an IA?
In the IB, you are assessed in multiple ways. Over the course of the 2 years in the diploma you have to write essays, make presentations, and write exams. There are so many assignments that you have to submit in the IB that there aren’t possibly enough IB examiners in the IB to grade every assignment! The IB’s solution to this is to allow your teachers to do some of the grading for them! Any assignment that your teacher grades, instead of an IB examiner, is called an internal assessment.
For example, in IB Economics you are required to write 3 commentaries (essays) over the course of your 2 years. These commentaries are internal assessments, so they will be graded by your teacher!
Every subject in the IB has some internal assessments. These may come in the form of essays, commentaries, or oral presentations.
Why does it matter if an assignment is internally assessed?
Since your grade for all of your internal assessments is decided by your teacher, it’s important to listen carefully to their advice! If you see advice online that is contrary to what your teacher recommends, it is smarter to follow your teacher’s guidance as they will be the ones giving you your final grade! If you’re looking for additional support to excel in your Internal Assessments or any other part of your IB studies, explore our IB Tutoring services to connect with expert tutors who can guide you through the process and help you achieve top marks.
My teacher is a really strict grader – will this negatively affect me?
The IB has a method to ensure that students aren’t unfairly punished if you have a teacher who grades strictly. An external IB examiner will ‘moderate’ a few of the assignments from every school in order to make sure the teacher has fairly assigned grades. This examiner will judge if your teacher has given grades according to the IB guidelines. In the case that your teacher graded the assignments too harshly or too leniently, the examiner will adjust all scores for the class to ensure you get the grade you deserve.
So what is an external assessment?
As the name suggests, external assessments are those sent directly to an external IB examiner, so your teacher doesn’t decide your grade. The best example of external assessments are your final exams at the end of your IB. These are sent directly to the IB and sent to external examiners, so your school teachers have nothing to do with them!
Hopefully that clears up some of the confusion around the difference between an IA and an external assessment! Both are very important to your final IB grade, but they are graded completely differently.

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An IB Internal Assessment (IA) is an assignment that is graded by your own subject teacher, rather than an external IB examiner. These assignments contribute significantly to your final IB grade and can take various forms, such as essays, commentaries, oral presentations, or practical investigations, depending on the subject.
Internal Assessments are crucial because they contribute a substantial portion to your final IB grade in each subject. Since your teacher grades them, their feedback and guidance are particularly important to ensure you meet the specific criteria and achieve the best possible marks.
Your IB Internal Assessments are initially graded by your own subject teacher. The IB then uses a moderation process where an external IB examiner reviews a sample of IAs from your school to ensure fair and consistent grading according to IB guidelines.
The IB has a moderation process to ensure fairness. If your teacher is a strict grader, an external IB examiner will review a sample of IAs from your class. If the examiner finds that your teacher graded too harshly (or too leniently), they will adjust the grades for the entire class to ensure all students receive a fair mark in line with IB standards.
The key difference lies in who grades them. Internal Assessments (IAs) are initially graded by your school teacher and then moderated by the IB. External Assessments (EAs), such as your final IB exams, are sent directly to external IB examiners for grading, with no involvement from your school teachers in the grading process. Both contribute to your final IB Diploma score.
Lanterna's expert tutors, many of whom are 40+ point IB graduates or experienced IB teachers and examiners, provide personalised support for IAs across all subjects. We can help you refine your research question, structure your investigation, develop your analysis, and ensure your work meets the IB's specific criteria, all while maintaining academic integrity.
Yes, absolutely. Lanterna has a global network of over 600 highly qualified IB tutors covering virtually every IB subject at both Standard Level (SL) and Higher Level (HL). Whether you need help with a Biology IA, an Economics commentary, a Maths exploration, or any other subject's IA, we have an expert ready to support you.
The Lanterna IB consultation is a free, no-pressure 20-30 minute session with one of our expert IB Student Success Experts. It's designed to help you clarify your current situation, understand what's coming next in your IB journey, and walk away with a personalised plan and clear priorities, without any obligation to book tutoring.
Yes, the Lanterna IB consultation is completely free. We believe in providing valuable support and clarity to IB students and parents upfront, helping you understand your options and next steps without any financial commitment.
After your free 20-30 minute consultation, you'll have a clear, personalised plan for your IB studies, outlining key priorities and next steps. There's absolutely no obligation to continue with tutoring. If you do decide that personalised tutoring could benefit you, your Student Success Expert can help you explore how Lanterna's tutors can support your specific goals.
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