The big ideaA rule tells us which group each thing goes in. A new rule makes new groups.
How it works
A rule tells us which group each thing goes in.
Same rule, same group, every time.
A new rule makes new groups.
Two boxes, one rule.
Example 1: Round things
The rule is: round things go in the blue box.
A ball is round, so it goes in blue.
A coin is round too, so it goes in blue.
Example 2: Things with corners
The rule is: things with corners go in the yellow box.
A block has corners, and so does a book.
Both go in the yellow box.
Example 3: A new rule
Mia tries a new rule: color.
Blue things go in one box and yellow things in the other.
The same toys make new groups, because the rule decides.
A new rule makes new groups.
Example 4: Same rule again
A ball went in the blue box.
Next time, a ball goes in the blue box again.
Same rule, same group, every time.
Words to know
rule
Something that tells us where each thing goes.
group
Things that go together.
round
Shaped like a ball or a circle.
corners
Pointy places where sides meet.
Watch out
Use one rule at a time.
A thing with corners is not round, even if it is small.
A new rule can put the same toys in new groups. That is okay.
Ask the rule first, then choose the box.
Try it
Round things go in the blue box. Where does a clock go?
Corners go in the yellow box. Where does a picture frame go?
What does a rule tell us?
What happens when we change the rule?
Answers: 1. The blue box · 2. The yellow box · 3. Which group each thing goes in · 4. We get new groups
Try at homeWith a grown-up, make two groups of things from around the house, like spoons and forks, or socks and shoes. Keep your rule a secret. The other person guesses the rule from the groups. Then try a new rule on the very same things, like big and small, and see new groups.
For grown-upsSort spoons and forks, or socks and shoes, into two groups with your child, and keep your rule a secret. Let your child guess the rule, then try a new rule on the same things.
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