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Sorting things into groups

Choosing what to sort by, and putting each thing where it belongs.

Paper packet. Every task here also exists on screen, where it is checked automatically; answers written on paper are not assessed by Nydus. When you are back at a device, enter your answers there.

1. What you will learn

Today we sort things into groups. We choose a rule, like color or size, and put each thing where it belongs.

2. Words to hear

TermWhat it means
SortPut things into groups by a rule.
RuleWhat every thing in a group must have.

3. Choose one rule

Sorting puts things together by a rule. A circle group can hold circles of different colors. A red group can hold red things of different shapes. Say or show your rule before you start. Then use that same rule for every object. Do not switch from color to shape halfway through.

Another way: picture

Left to right: red circle, red square, blue circle, blue square.
Left to right: red circle, red square, blue circle, blue square.

Find the circles. Now find the red tiles. One tile belongs to both collections, under different rules.

4. Check the group

Take one tile at a time. Ask whether it follows your rule. Put it in the group only if it does. Look back over the finished group. A red square belongs with red circles when the rule is red. It does not belong when the rule is circle.

5. Clean-up play

Sort toy dishes by shape or color. Tell an adult your rule. Ask the adult to offer a new dish, then show why it belongs or stays outside.

6. Sort by shape

  1. Sorting tiles
    Sorting tiles

    Choose the circle rule.

    Round edges, no corners.

    We are comparing shape.

  2. Collect the round tiles.

    Red circle and blue circle.

    Their different colors do not matter.

7. Sort the tray by color instead

  1. Sorting tiles
    Sorting tiles

    Choose red as the rule.

    Red tiles only.

    The property has changed.

  2. Your turn: work this step out. Its working is at the end of the packet.

    Check the red square.

8. Guided practice

A basket is for circles. Which tile belongs?

Audio transcript: None

9. Guided practice

Sort the tiles into a circle group and a square group.

Circle groupSquare group
○
□

Audio transcript: None

10. Practice

Mark every circle in the tray. Leave the squares unmarked.

This task has no paper form; do it on a device.

Audio transcript: None

11. Practice

![Tray](img_pk_sort_tray@1) Sort by color, ignoring shape. Record how many red objects and how many blue objects.

Red objects: red. Blue objects: blue.

Audio transcript: None

12. Somewhere new

A toy road has signs sorted into the triangle box. A new sign must join it. Which belongs: a round sign, a three-straight-sided sign, or a four-sided sign?

Audio transcript: None

13. Somewhere new

A toy shop puts every circle in one basket and every square in another. Both baskets have red and blue tiles. Which rule explains the sorting?

Audio transcript: None

14. Lesson test

Lesson test: one question per skill, one attempt each, no hints. Your answers are checked when you submit.

15. Test question

Change the rule: collect every RED tile. Mark all tiles that follow this new rule.

This task has no paper form; do it on a device.

Audio transcript: None

16. What you can do now

You can sort things into groups and say your rule. What is another way to sort the same buttons?

Working for the steps left to you

7. Sort the tray by color instead, step 2

It belongs.

It follows the color rule.