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Finding one more and one less with manipulatives and images
You can find one more and one less with manipulatives and images.
Lesson 9 of 10
New
New
- Year 1
Finding one more and one less with manipulatives and images
You can find one more and one less with manipulatives and images.
Lesson details
Key learning points
- Secure understanding of one more and one less using a variety of manipulatives and pictures.
- Use stem sentences including one more than and one less than.
Keywords
One more - The next number in the count is one more than the number before and there will be one more object in the set.
One less - The previous number in the count is one less than the next number and there will be one fewer object in the set.
Common misconception
Incorrect sequence of counting when recalling the next and previous numbers.
Start with parts of the sequence where pupils are confident to secure the concept of counting on for one more and back for one less.
Encourage pupils to see patterns when arrays, grids and bead strings are used to display numbers and ask them to identify the one more or the missing one when the image displays one less or fewer.
Teacher tip
Licence
This content is © Oak National Academy Limited (2025), 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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Prior knowledge starter quiz
6 Questions
Q1.When you count to 20, which number do you say before 15?
When you count to 20, which number do you say before 15?
Q2.When you count back from 20 to zero, what number comes before 15?
When you count back from 20 to zero, what number comes before 15?
Q3.Count up from 1 in a whispering voice and stop at 17. What number will you say next?
Count up from 1 in a whispering voice and stop at 17. What number will you say next?
Q4.Count back from 20 in a loud voice and stop at 13. What number will you say next?
Count back from 20 in a loud voice and stop at 13. What number will you say next?
Q5.What number bead string is missing?
What number bead string is missing?
11
12
13
15
Q6.Which bead string shows 14?
Which bead string shows 14?
The bottom one
Neither
Assessment exit quiz
6 Questions
Q1.Which picture shows one more than the number of chicks?
Which picture shows one more than the number of chicks?
A
B
Q2.Which picture shows one less than the number of pens?
Which picture shows one less than the number of pens?
B
C
Q3.What number comes next?
What number comes next?
12
14
15
Q4.What number is one less than 12?
What number is one less than 12?
10
12
13
Q5.What number is one more than 16?
What number is one more than 16?
Q6.What number is one less than 16?
What number is one less than 16?