Grade by Grade
Strand A: Foundations of Language and Mathematics ยท Patterns, Shapes, Measuring and Sorting

Sorting Things into Groups

A8.1About 20 minutes
Learning goals
  • I can sort things into groups.
  • I can tell my sorting rule.
  • I can sort the same things in a new way.
  • I can find the one that does not belong.

Words to know

sort
To put things that are the same in some way into a group together.
group
Some things that go together.
same and different
Same means alike. Different means not alike.
sorting rule
How you decided to sort, like "by colour" or "things that roll".

What a mess!

Grown-up, read this out loud.

The laundry basket is full of socks, mittens and shirts all mixed up. How can we tidy it?

We can sort! Socks go in one pile. Mittens go in another pile. Shirts go in another pile.

Three neat piles on a bed: rolled-up socks, knitted mittens and folded t-shirts, next to a laundry basket.
The laundry is sorted! Socks are in one pile, mittens in another pile, and shirts in another pile. What is the sorting rule? AI-generated image

When we sort, we put things that are the same in some way together.

We can sort by:

  • colour (red things, blue things)
  • shape (round things, square things)
  • size (big things, small things)
  • kind (animals, fruit, toys)
  • what they do (things that roll, things that fly)

The way we sort is called our sorting rule.

Worked example

Let's sort a snack

๐ŸŽ๐ŸŒ๐ŸŽ๐Ÿ‡๐ŸŒ๐ŸŽ

Sort the fruit.

  1. Look at all the fruit. What is the same? What is different?
  2. Pick a sorting rule: by kind of fruit.
  3. Put the apples together, the bananas together and the grapes together.
  4. Count each group.

3 apples, 2 bananas, 1 bunch of grapes.

๐ŸŽ๐ŸŽ๐ŸŽ๐ŸŒ๐ŸŒ๐Ÿ‡
After sorting: 3 apples, 2 bananas, 1 bunch of grapes.
Worked example

Let's sort by what things can do

โšฝ๐Ÿš—๐Ÿงธ๐Ÿ“˜

Sort the things by rolls and does not roll.

  1. Ask about each toy: "Can it roll?" Try it if you have one!
  2. The ball rolls. The car rolls on its wheels.
  3. The teddy bear does not roll. The book does not roll; it slides or falls flat.
  4. Make two groups.

Rolls: โšฝ๐Ÿš—. Does not roll: ๐Ÿงธ๐Ÿ“˜. We could also sort these same things another way, like soft and hard.

RollsDoes not rollballcarteddybook
Our sorting rule is rolls or does not roll. The ball is round and the car has round wheels, so they roll.

Play "What's my rule?"

A grown-up sorts some things without telling the rule. Your child looks and guesses the rule. Then switch!

Example: ๐Ÿ”ด๐Ÿ“๐ŸŽ in one group and ๐Ÿ”ต๐Ÿซ in another. The rule is red things and blue things.

Hands-on activity

Sorting at home

Pick one:

  • Laundry sort: sort clean socks by colour, or find the pairs.
  • Drawer sort: sort spoons and forks (grown-ups handle any knives).
  • Toy sort: sort toys by colour, by size, or by "rolls / does not roll".

After sorting, ask: "What is your rule?" and "Can you sort them a different way?"

Just for fun

Why was the lonely sock so happy at sorting time?

It finally found its pair! ๐Ÿงฆ

Your turn

1

๐ŸŽ๐ŸŒ๐ŸŽ๐ŸŒ๐ŸŽ

Sort them. How many apples? How many bananas?

2

๐Ÿ”ด๐ŸŸข๐Ÿ”ด๐Ÿ”ด๐ŸŸข

Sort by colour. How many in each group?

3

๐Ÿถ๐Ÿฑ๐Ÿฎ๐Ÿš—

Which one does not belong? Why?

4

Group 1: ๐ŸŽ๐Ÿ“๐Ÿ’

Group 2: ๐ŸŒ๐Ÿ‹

What is the sorting rule?

5

๐ŸŸ๐Ÿ„๐Ÿ™๐Ÿ•

Sort them: lives in water, or lives on land.

6

Sort some shoes at your door. Tell your rule.

More practice: warm-up

1

๐ŸŽ๐ŸŽ๐ŸŽ๐ŸŒ

Which one does not belong?

2

โญโญ๐ŸŒ™โญ

Which one does not belong?

3

๐Ÿ”ต๐ŸŸก๐Ÿ”ต๐ŸŸก๐Ÿ”ต

How many blue?

4

Do mittens ๐Ÿงค go on your hands or your feet?

5

๐Ÿฆ๐Ÿฆโœˆ๏ธ๐Ÿฆ

Which one is not a bird?

More practice: on your own

1

๐Ÿš—๐Ÿšฒ๐ŸšŒโœˆ๏ธ๐Ÿš

Sort them: goes on the road, or flies.

2

Group 1: ๐Ÿงค๐Ÿงฃ๐Ÿงข

Group 2: ๐Ÿฉณ๐Ÿฉด

What is the rule?

3

๐Ÿ”ด๐ŸŸฅ๐Ÿ”ต๐ŸŸฆ๐ŸŸก

Sort them by shape.

4

๐Ÿ”ด๐ŸŸฅ๐Ÿ”ต๐ŸŸฆ๐ŸŸก

Now sort the same ones by colour.

5

๐ŸŽ๐ŸŒ๐Ÿฅ•๐Ÿ‡

Which one does not belong? Why?

Challenge

1

๐Ÿถ๐ŸŸ๐Ÿฆ๐Ÿฑ๐Ÿ ๐Ÿฆ‰

Sort them into 3 groups: walks, swims, flies.

2

Yes group: ๐ŸŠโšฝ๐ŸŒ•

No group: ๐Ÿ“˜๐Ÿงฑ

What is the rule?

3

Sort 10 toys two different ways. Tell both rules.

Check your understanding

Quiz

1.

๐Ÿถ๐Ÿฑ๐Ÿฐ๐ŸŽ

Which one does not belong?

2.

๐Ÿ”ด๐Ÿ”ด๐Ÿ”ด

Why are these in one group?

3.

๐ŸŽ๐ŸŒ๐ŸŽ๐ŸŽ

Sort them. How many apples?

4.

Which one is sorted by colour?

For parents and teachers

What this is about: Sorting is the start of organizing information (data). Children sort by one attribute (colour, shape, size, kind) and explain their sorting rule. They also learn that the same things can be sorted in more than one way.

How to help at home:

  • Make sorting part of chores: laundry, groceries, cutlery, toy clean-up.
  • Always ask, "What is your rule?" and "Can you sort them another way?"
  • Play "What's my rule?" and "Which one does not belong?" Accept any answer your child can explain well.

Common difficulties:

  • Changing the rule halfway (starting with colour, then switching to size). Ask, "What was your rule?" and check each item.
  • "Which one does not belong?" can have more than one good answer. Praise a good reason.