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Primes, improper fractions and volume

Mathematics

Primes, improper fractions and volume

An AR classroom game for Grade 5. 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.5/2

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 numbers into groups.

    Sort into

    • prime
    • composite
    • 29
    • 28
    • 31
    • 33
    Read the explanation

    A prime number has exactly two factors.

  2. Sort the fractions into groups.

    Sort into

    • proper fraction
    • improper fraction
    • 3/5
    • 7/5
    • 2/7
    • 9/7
    Read the explanation

    An improper fraction is worth more than one.

  3. Sort the times into groups.

    Sort into

    • less than 1 hour
    • more than 1 hour
    • 45 minutes
    • 90 minutes
    • 30 minutes
    • 120 minutes
    Read the explanation

    Compare with one hour, which is sixty minutes.

Before you play

Game teaching guide

What children will practise

Classify primes versus composites, proper versus improper fractions, times shorter or longer than 1 hour, and problems that ask for area (two measurements) versus volume (three).

What's in the worksheet

4 sorting rounds, dragging 4 cards into 2 groups - Prime or composite: 29, 28, 31, 33 - Proper or improper fraction: 3/5, 7/5, 2/7, 9/7 - Less or more than 1 hour: 45, 90, 30 and 120 minutes - Finds area or volume: a room 3 by 4, a box 3 by 4 by 5, a field 20 by 30, a cupboard 1 by 2 by 2

How to use it in class

Use as a mid-unit or pre-quiz review; about 5 minutes. - Play in teams and let teams keep a times-table grid for round 1 - If round 1 goes badly, have the whole class try 33 ÷ 3 and 28 ÷ 2 together - In round 4, point out that the items with tall/height have three numbers, so they are volume - Play it linked to the class to record results in the mark book.

Common sticking points

- Round 1: 33 often goes in the prime group because it is odd and unfamiliar; check with 3 × 11 - Round 1: 29 and 31 may be thought composite just for being two-digit; try dividing by 2, 3 and 5 - Round 3: 90 minutes may be put under 1 hour by children who think an hour is 100 minutes; stress that 1 hour is 60 minutes

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

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