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Help with the IB core:
IA, EE and TOK

The core is worth up to 3 diploma points. Use examiner-marked samples, step-by-step checklists and one-to-one sessions with a core specialist.

Talk to a core specialist
IA

Internal Assessment

Subject-specific coursework that counts for up to 30% of your final grade.

  • Help choosing a topic
  • Feedback against each criterion
  • Structure and formatting checks
  • Data analysis support
EE

Extended Essay

A 4,000-word independent research project on a topic of your choice.

  • Writing a research question
  • Source evaluation (OPVL)
  • Academic writing coaching
  • Reflections (RPPF) support
TOK

Theory of Knowledge

A critical thinking course on how we know what we know, assessed by an essay and an exhibition.

  • Help with knowledge questions
  • Real-world situations (RWS)
  • Areas and ways of knowing
  • Essay outline review

Learn from
IB examiners

Our core team includes current and former IB examiners. They'll show you how each criterion is marked and what a top-band answer looks like.

Annotated samples

IA samples that scored 7, annotated by examiners.

Criterion guides

Plain-English explanations of each marking rubric.

The core checklist pack

Digital download · 2026 edition

The OPVL source analysis framework
TOK essay structure (7-step method)
Math IA exploration checklist
Physics IA uncertainty modelling
Economics IA key concepts guide