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Fractions, primes and patterns

Mathematics

Fractions, primes and patterns

An AR classroom game for Grade 4. Learners can aim with their hands at the camera or play by tapping the screen.

This set has 4 rounds in an interactive sorting activity.

Curriculum indicatorค 1.1 ป.4/4

PlayHost a classroom

A look before you play

Sample questions

A few real prompts from the game to help you choose an activity for your class.

  1. Sort the fractions into groups.

    Sort into

    • less than a half
    • more than a half
    • 1/3
    • 2/3
    • 1/4
    • 5/8
    Read the explanation

    Compare with a half: if the top is less than half the bottom, the fraction is less than a half.

  2. Sort the numbers into groups.

    Sort into

    • prime
    • composite
    • 17
    • 18
    • 23
    • 24
    Read the explanation

    A prime number has exactly two factors.

  3. Sort the sequences into groups.

    Sort into

    • adds the same each time
    • multiplies by the same each time
    • 3, 6, 9, 12
    • 3, 6, 12, 24
    • 5, 10, 15, 20
    • 2, 6, 18, 54
    Read the explanation

    Separate the sequences that add from those that multiply.

Before you play

Game teaching guide

What children will practise

Compare fractions with a half (indicator ค 1.1 ป.4/4), sort primes from composites, tell patterns that add the same amount from those that multiply, and judge when an estimate is enough (indicator ค 1.1 ป.4/7).

What's in the worksheet

4 sorting questions with 2 boxes each - 1/3 and 1/4 are less than a half; 2/3 and 5/8 are more - 17 and 23 are prime; 18 and 24 are composite - 3, 6, 9, 12 adds the same each time; 2, 6, 18, 54 multiplies - "Roughly how many kilometres did the car travel?" can be estimated; "How much change?" needs an exact answer

How to use it in class

Use for P4 mid-term review, 6-8 minutes, team mode. - 3, 6, 12, 24 is a good trap: it starts 3, 6 like the adding pattern, so teams must check every step, not just the first two - After the estimation question, ask each team for one more situation where an estimate is fine - For primes, have teams list the factors of 23 on paper before deciding - Play it linked to the class to record results in the mark book

Common sticking points

- Putting 3, 6, 12, 24 under adding by looking only at 3 to 6. Check every step: 6 to 12 is not +3 - Putting 5/8 under less than a half, not knowing half of 8 is 4 - Calling 23 composite because it is an unfamiliar odd number. Try dividing by 2, 3 and 5 - Thinking "What is the total price?" can be estimated, which is true when planning; discuss that paying needs the exact amount

Play together first, then build on it with a worksheet for the same level.

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Fractions, primes and patterns — AR game for Grade 4 | Krufahda