Starter quiz
- What is missing in the count? 1, 2, 3, _, 5
- 3
- 4 ✓
- 5
-
- What number is missing when counting back from 5? 5, 4, _, 2, 1
- 3 ✓
- 4
- 5
-
- The number before my number is one ___ than my number.
- more
- less ✓
-
- The number after my number is one ___ than my number.
- more ✓
- less
-
- What is one more than 3?
- 2
- 3
- 4 ✓
-
- What is one less than 3?
- 2 ✓
- 3
- 4
-
Exit quiz
Izzy thinks the missing number will be the same for both of these. Is she correct?- Yes ✓
- No
-
Jacob thinks the missing number will be the same for both of these. Is he correct?- Yes
- No ✓
-
Jacob has 4 conkers in his pocket. He finds one more. How many conkers does he have now?- 3
- 4
- 5 ✓
-
Izzy has 3 pounds in her piggy bank. She is given one more pound. How many does she have now?- 2
- 3
- 4 ✓
-
- Jacob has 4 conkers in his pocket. He gives one to Izzy. How many conkers does he have left in his pocket?
- 2
- 3 ✓
- 4
- 5
-
Izzy has 5 pounds in her piggy bank. She takes one pound out to spend. How many does she have left?- 3
- 4 ✓
- 5
- 6
-
Worksheet
Loading worksheet ...
Presentation
Loading presentation ...
Video
Lesson Details
Key learning points
- Movement is magnitude. As you move forwards through the counting sequence the quantity increases by one.
- Movement is magnitude. As you move backwards through the counting sequence the quantity decreases by one.
- Use a number line to model the counting sequence and include zero.
Common misconception
Children may confuse one more and one less, particularly when finding missing numbers.
Use the stem sentence __ is one more / less than __ because it comes after / before it in the count.
Keywords
One more - The number after a given number is one more than it.
One less - The number before a given number is one less than it.
Before - A number that is before another comes earlier in our count.
After - A number that is after another comes later in our count.
Number line - A line with numbers placed in their correct position.
+