Explaining, convincing and proving

  • problem

    Noah

    Age
    5 to 7
    Challenge level
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    Noah saw 12 legs walk by into the Ark. How many creatures did he see?

  • Let's Investigate Triangles
    problem

    Let's investigate triangles

    Age
    5 to 7
    Challenge level
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    Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?

  • Adding all nine
    problem

    Adding all nine

    Age
    11 to 14
    Challenge level
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    Make a set of numbers that use all the digits from 1 to 9, once and once only. Add them up. The result is divisible by 9. Add each of the digits in the new number. What is their sum? Now try some other possibilities for yourself!
  • Calendar Capers
    problem

    Calendar capers

    Age
    11 to 14
    Challenge level
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    Choose any three by three square of dates on a calendar page...
  • Breaking the Equation ' \Empirical Argument = Proof '
    article

    Breaking the equation 'empirical argument = proof '

    This article stems from research on the teaching of proof and offers guidance on how to move learners from focussing on experimental arguments to mathematical arguments and deductive reasoning.

  • Symmetric Tangles
    article

    Symmetric tangles

    The tangles created by the twists and turns of the Conway rope trick are surprisingly symmetrical. Here's why!
  • Primary Proof?
    article

    Primary proof?

    Proof does have a place in Primary mathematics classrooms, we just need to be clear about what we mean by proof at this level.
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