New
New
Year 1

Conservation

I can explain that when a number of objects has been rearranged, the amount stays the same, as long as nothing has been added or taken away.

New
New
Year 1

Conservation

I can explain that when a number of objects has been rearranged, the amount stays the same, as long as nothing has been added or taken away.

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Lesson details

Key learning points

  1. Recognise amounts that have been rearranged.
  2. Generalise that if nothing has been added or taken away, then the amount is the same.

Keywords

  • Same - Way in which two or more things we are comparing are like each other.

  • None - None means the same as nothing or not having changed something.

  • Some - Some means a number of things.

Common misconception

If using slides, not recognising objects have been rearranged and counting all again.

Gather objects to manipulate (either under a visualiser with the whole class, or in front of a small group) so that children can clearly see that none have been added or taken away.

Set up the ideas within the slides practically so that children can clearly see what is happening to each set of objects. You might wish to try using a puppet to challenge the ideas throughout this lesson.
Teacher tip

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Lesson video

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6 Questions

Q1.
What comes next? 1, 2, 3, 4, 5...
4
5
Correct answer: 6
Q2.
How many pieces of fruit?
An image in a quiz
5
6
Correct answer: 7
Q3.
How many cakes?
An image in a quiz
5
Correct answer: 6
7
Q4.
How many candles are on the cake?
An image in a quiz
4
Correct answer: 5
6
Q5.
What comes next? 6, 7, 8, 9 ....
8
9
Correct answer: 10
Q6.
What does subitise mean?
Correct answer: Knowing the amount without counting
Counting the amount

6 Questions

Q1.
The same or not the same?
An image in a quiz
Correct answer: The same
Not the same
Q2.
The same or not the same?
An image in a quiz
The same
Correct answer: Not the same
Q3.
The same or not the same?
An image in a quiz
The same
Correct answer: Not the same
Q4.
The same or not the same?
An image in a quiz
Correct answer: The same
Not the same
Q5.
When objects move, the total is ...
Correct answer: the same
not the same
Q6.
When none are added, the total is ...
Correct answer: the same
not the same