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Sorting and ordering numbers

Mathematics

Sorting and ordering numbers

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
    • not prime
    • 7
    • 9
    • 11
    • 15
    Read the explanation

    A prime number has only one and itself as factors.

  2. Sort the numbers into groups.

    Sort into

    • divides exactly by 3
    • does not divide exactly by 3
    • 12
    • 14
    • 27
    • 20
    Read the explanation

    A number divides by three exactly when the sum of all its digits does.

  3. Sort the decimals into groups.

    Sort into

    • less than 1
    • more than 1
    • 0.8
    • 1.5
    • 0.95
    • 2.1
    Read the explanation

    Compare with one: a decimal with no whole number in front is always less than one.

Before you play

Game teaching guide

What children will practise

Classify prime numbers, numbers that divide exactly by 3, decimals below or above 1, and two-dimensional versus three-dimensional figures.

What's in the worksheet

4 sorting rounds, dragging 4 cards into 2 groups - Prime or not: 7, 9, 11, 15 - Divides exactly by 3 or not: 12, 14, 27, 20 - Less or more than 1: 0.8, 1.5, 0.95, 2.1 - Two- or three-dimensional: circle, sphere, square, cube

How to use it in class

Use as a review before prisms and 3D shapes; about 4 minutes. - Solo mode is fine since each round has few cards - For round 4, hold up a ball and draw a circle on the board to show sphere versus circle - If round 1 goes badly, point out 9 = 3 × 3 and 15 = 3 × 5; not every odd number is prime - Play it linked to the class to record results in the mark book.

Common sticking points

- Round 1: 9 and 15 go in the prime group because they are odd - Round 4: circle and sphere are confused because the Thai names are similar, and the cube may go in the 2D group because children picture its square face - Round 3: 0.95 may go above 1 because 95 is a big number

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

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