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IB Jargon for Parents

IB Jargon for Parents

4 min read | | 01/01/2026

IB Jargon Demystified for Parents: Translate TOK, HL, SL, IA, and Predicted Grades to easily understand school communications.

IB Jargon Demystified: A Parent's Guide

Welcome to the International Baccalaureate! As your child begins this challenging and rewarding journey, you'll probably start hearing a lot of acronyms: TOK, IA, HL, SL. It can feel like learning a new language. This guide is designed to be your translator, helping you understand the key terms so you can better support your child and feel confident during conversations with their school.

Think of us as your personal tutor. Let's break down exactly what these terms mean for your child's education.

What is TOK (Theory of Knowledge)?

In simple terms: TOK isn't a typical subject with facts to memorize. It's a critical thinking class that explores the very nature of knowledge. The central question is, "How do we know what we claim to know?"

Students don't learn *what* to think, but *how* to think. They'll explore different ways of knowing (like reason, emotion, and language) and different areas of knowledge (like history, the arts, and natural sciences). This helps them connect their learning across all their IB subjects.

  • Why it matters: TOK develops analytical and argumentation skills that are invaluable for university and beyond. It teaches students to challenge assumptions and understand diverse perspectives.
  • How it's assessed: There are two parts: a 1,600-word essay on a prescribed title and an "exhibition" where students reflect on how TOK manifests in the real world.
  • The Core Points: TOK is a mandatory "core" component of the IB Diploma. A good grade, combined with the Extended Essay (EE) grade, can add up to three bonus points to their final IB score.
How You Can Help: Encourage curiosity at home. Ask open-ended questions during dinner conversations like, "How does that news source know that's true?" or "What's another way to look at this issue?". This mirrors the kind of thinking they do in TOK class.

HL vs. SL: What's the Difference?

Every IB Diploma student takes six subjects. They choose three to study at Higher Level (HL) and three at Standard Level (SL). The right balance is key to a manageable workload and a strong university application.

FeatureHigher Level (HL)Standard Level (SL)
Depth & ScopeMore in-depth and rigorous. Covers additional topics and delves deeper into the "how" and "why".Covers the core syllabus of the subject, providing a broad and solid foundation.
Teaching HoursAround 240 hours over two years.Around 150 hours over two years.
AssessmentMore demanding assessments, often with extra exam papers or more complex questions.Comprehensive assessments that cover the core curriculum.
University ViewCrucial for university applications. Many competitive courses have specific HL subject requirements.Provides breadth to a student's profile, showing they have a well-rounded education.
The Lanterna Tip: The choice of HL subjects should be guided by your child's strengths, interests, and, most importantly, the entry requirements for the university courses they are considering. It's much harder to switch from SL to HL than the other way around.

Decoding the IA (Internal Assessment)

The IA is a major, research-based project that students complete for nearly every subject. It's their chance to dive deep into a topic that genuinely interests them, applying the skills they've learned in class. The IA is a huge part of the IB philosophy, promoting independent learning and research skills.

What it looks like in practice:

  • In Sciences: A hands-on experimental investigation and lab report.
  • In Mathematics: A written exploration of a mathematical concept or problem.
  • In History: A historical investigation essay on a specific question.
  • In Languages: An oral presentation and analysis.

Crucially, the IA makes up a significant portion of the final grade for a subject, typically 20-30%. It is marked by their classroom teacher and then moderated by the IB to ensure global standards are consistent.

How You Can Help: Your role is supporter, not editor. Help your child break down the project into a manageable timeline. Ask questions to help them clarify their ideas. Most of all, encourage them to communicate regularly with their teacher, who is their primary guide for this project.

The Importance of Predicted Grades

Predicted Grades are the grades the school estimates your child is likely to achieve in their final exams. They are not a guess; they are a professional judgment based on solid evidence.

Why they are so critical: For university applications (especially to the UK, USA, and Europe), Predicted Grades are everything. Universities use these grades to decide whether to make a conditional offer of admission, as applications are often submitted before final IB exams are taken.

How they are determined:

  • Performance in mock exams.
  • Scores on Internal Assessments (IAs).
  • Consistency and effort shown in class tests, homework, and participation throughout the two years.

Schools typically finalize these grades in the autumn of the final year (DP2). A strong set of predictions is essential for opening doors to top universities. It’s important to understand that a university offer is often conditional on achieving final grades that are close to the predicted ones.

The Big Picture: Emphasize to your child that consistent effort from day one of the IB programme matters. Predicted Grades are a reflection of two years of work, not just a last-minute push before applications are due.


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Higher Level (HL) subjects are more in-depth, cover more content, and require around 240 teaching hours. They are meant for subjects a student is passionate about or needs for their desired university course. Standard Level (SL) subjects provide a broader education with around 150 teaching hours. Students typically take three HL and three SL subjects, and this choice is critical for university applications.

The best strategy is to align HL subjects with university entry requirements and a student's academic strengths. SL subjects can then be chosen to maintain a balanced and broad education. Making the right choice can be stressful, which is why our Student Success Experts offer guidance during a free IB consultation, helping you map subject choices to future goals.

An Internal Assessment (IA) is a major project, like a science lab report, a historical investigation, or a maths exploration, that students complete during their course. IAs are extremely important as they typically account for 20-30% of the final subject grade and are a fantastic opportunity to develop the independent research skills required for university.

Yes, absolutely. Our tutors are all high-achieving IB graduates who excelled in their own IAs. They can help students refine their research question, structure their analysis, and understand the marking criteria to aim for top marks, all while strictly following the IB's academic honesty guidelines.

Predicted Grades are a teacher's professional estimate of the final grade a student will achieve. They are based on a student's performance throughout the DP, including mock exams, coursework, and IAs. These grades are vital as many universities, especially in the UK, use them to make conditional admission offers.

This is a common concern, but there's definitely time to improve. The key is to create a strategic plan to address weak areas. A free consultation with a Lanterna Student Success Expert can help build that plan. Our expert tutors can then provide targeted support to boost knowledge, exam technique, and confidence before the final exams.

It's a free, 20-30 minute online session with one of our Student Success Experts, designed for IB students and their parents. The goal is to discuss your specific challenges, set clear academic priorities, and develop a personalised action plan to help you succeed in the IB.

Yes, 100%. The consultation is completely free and there is absolutely no obligation to purchase tutoring. We are committed to providing genuine value and expert advice upfront. You will leave the call with a clearer understanding and actionable next steps, whether you decide to work with us or not.

The consultation is for any IB family (students and/or parents) seeking clarity and direction. Whether you are a pre-IB student choosing subjects, a DP1 student struggling with the workload, or a DP2 student preparing for final exams, our Student Success Experts can provide the expert guidance you need.

They are IB programme specialists, many of whom are high-achieving IB graduates themselves. They act as your family's personal guide, using their deep "insider" knowledge to build tailored study plans, answer your questions, and match your child with the perfect tutor to help them achieve their academic goals.


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