Mathematics

Sorting by property

An AR classroom game for Grade 2. 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.2/1

Play Host 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.

01
Sort the numbers into groups.
Sort into
- two digits
- three digits
- 45
- 120
- 88
- 305
Read the explanation
A two-digit number has two figures; a three-digit number has three.
02
Sort the sums into groups.
Sort into
- needs adding
- needs subtracting
- how many altogether?
- how many are left?
- how many altogether?
- how much is left after spending?
Read the explanation
Look at the sign in the problem - is it plus or minus?
03
Sort the numbers into groups.
Sort into
- ends in 0
- does not end in 0
- 40
- 37
- 90
- 62
Read the explanation
A number that divides exactly by ten ends in zero.

Before you play

Game teaching guide

What children will practise

Sort by different properties: two-digit versus three-digit numbers (indicator ค 1.1 ป.2/1), word-problem phrases that signal adding or subtracting, numbers ending in 0, and units of length versus weight, so pupils learn to name the rule before deciding.

What's in the worksheet

4 sorting questions with 2 boxes each - 45 and 88 have two digits; 120 and 305 have three - "How many altogether?" signals adding; "How many are left?" and "How much is left after spending?" signal subtracting - 40 and 90 end in 0; 37 and 62 do not - Centimetre and metre measure length; gram and kilogram measure weight

How to use it in class

Use before starting word problems, since Q2 practises reading key phrases. About 5-6 minutes, team mode. - After Q2, have teams write a short problem using "left" or "altogether" for another team to classify - For units, ask for an example object measured with each one - The Q2 on-screen explanation says to look at the sign, but the cards have no signs; tell pupils the key words (altogether, left) are the cue - In English mode Q2 shows two identical "how many altogether?" cards; both belong in "needs adding". Play in Thai mode to avoid the confusion - Play it linked to the class to record results in the mark book

Common sticking points

- In Q2, weaker readers guess from card length. Have the cards read aloud one by one - "How much is left after spending?" mentions money, so some think of totalling. Underline "left" - Putting 305 in two digits because of the middle zero. Count the digits one by one - Grams may be unfamiliar; show a snack packet with its weight in grams