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Read annotated examples of IAs, EEs and ToK essays, with notes on why each part scores well.

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Extended Essay draft: feedback by criterion

  1. A. Focus and methodResearch question is clear and narrow.
  2. B. Knowledge and understandingDefine key terms in section 2.
  3. C. Critical thinkingAdd counter-arguments to your analysis.
  4. D. PresentationCheck the citation format.
  5. E. EngagementAdd more reflection on how your thinking changed.

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  • Physics
  • SL
  • Paper 2

A ball is thrown vertically upward at 12 m/s. Calculate its maximum height. [2 marks]

Student answer: h = 144 ÷ 9.8 = 14.7 m

Mark scheme: 1 of 2

  • M1 Uses v² = u² − 2gh with v = 0 (mark earned)
  • A1 Height = 7.3 m, with a correct unit (mark not earned)

To fix: you missed the 2 in 2g, so divide 144 by 19.6.

Learn the structure

See how strong work introduces, develops and concludes an investigation.

Why enzymes denature

High temperatures break the bonds holding an enzyme in shape. Its active site changes shape, so the substrate no longer fits.

Common mistake: enzymes are not killed, because they were never alive.

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