A game to share, a class to inspire

The last number tells how many

EnglishKindergartenMathFree

Use a finished count to name the whole set, even when the same objects move.

What it is about

Match a counted set to its cardinal number even after rearrangement.

Kindergarten · 5–6 years · 30 challenges

Before you begin

Informal counting, spoken quantity words and experience with objects.

What the class will do

Choose and explain · 30 challenges
The last number tells how many
Match a counted set to its cardinal number even after rearrangement.

Using it in class

Read aloud and perform the specified demonstrations. Keep objects unchanged whenever rearrangement is stated. Distinguish the counted total from an object label, starting place, row length or number of groups. These tasks support cardinality; observe children counting real sets too.

Give everyone time to think and discuss before one pupil acts at the board. The class explains and confirms together; hints and explanations stay until you move on.

Use an up-to-date browser on a computer connected to a whiteboard or shared display. Touch, mouse and keyboard; optional audio and reduced motion. No pupil accounts or personal devices.

Choose from 5 challenges up to the full activity. Discussion determines the duration: you set the pace.

A look inside the activities

Choose and explain

Teacher: read aloud. Each dot was counted once: ● ● ● ●. The count ended at four. How many dots are in the whole set?

Explanation and discussion

Four tells how many dots were counted altogether, not only the final dot.

Point around the whole set when you say four.

Choose and explain

Teacher: read aloud. The same 5 counters are counted from left to right and then right to left, once each time. Which result is right?

One count must end at 1.
The right-to-left count must be larger.
Both counts end at 5.

Explanation and discussion

Both careful counts visit the same five objects once. Their order differs, but their total does not.

Show how to count the set in either direction.

Choose and explain

Teacher: read aloud. A correct count ends at 8. The same objects are rearranged. Which reason supports a total of 8 again?

The new arrangement looks longer.
The objects now touch one another.
No objects joined or left the set.

Explanation and discussion

The set still has the same eight objects. Length and touching concern arrangement, not how many objects belong to it.

Give a short explanation using the words same objects.

The last number tells how many

What it is about

Before you begin

What the class will do