For an introduction to what discrepant events are and how I used them with my IGCSE students, click here

The discrepant event resources for IGCSE are divided into two groups: Form 4 Discrepant Events and Form 5 Discrepant Events.

Form 4 Discrepant Events

  1. Magical Candle: About gaseous behavior.
  2. Plastic Bottle Canons: An observation and deduction exercise about elements in the periodic table.
  3. Water Bottle Explosion: About state of matter, energy and pressure.
  4. Uncanny Can: About state of matter.
  5. Dancing Coin: About state of matter.
  6. Rubbery Egg: About state of matter.
  7. Hair Brain Chemistry: An observation and deduction exercise on the patterns of reactivity.
  8. Fun with Liquid Nitrogen: About energy and state of matter.

Form 5 Discrepant Events

  1. Plastic bottle Canons: An observation and deduction exercise about elements in the periodic table and Stoichiometry (Quantitative Chemistry).
  2. Magical Beakers: About acid-base chemistry.
  3. Magical Crystals: About ion-exchange/precipitation/double displacement reaction.
  4. Gunpowder: Ideal Mixture: About Stoichiometry (Quantitative Chemistry)
  5. Sugar Daddy…with Flare: About Redox Reactions and Stoichiometry (Quantitative Chemistry)
  6. Cracking Crackers: About redox reactions.




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