Show one more and one less than a number using representations and describe this accurately
Lesson details
Learning outcome
I can recognise that the number before a given number is one less and the number after a given number is one more.
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.
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.
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.
Teacher tip
Provide opportunities for children to engage in varied fluency practice eg. completing one more / one less sentences presented in different ways, real-world problems where the 'answer' cannot be seen and real-word problems linking to measure.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.What is missing in the count? 1, 2, 3, _, 5
Q2.What number is missing when counting back from 5? 5, 4, _, 2, 1
Q3.The number before my number is one ___ than my number.
Q4.The number after my number is one ___ than my number.
Q5.What is one more than 3?
Q6.What is one less than 3?
Assessment exit quiz
6 Questions
Q1.Izzy thinks the missing number will be the same for both of these. Is she correct?
Q2.Jacob thinks the missing number will be the same for both of these. Is he correct?
Q3.Jacob has 4 conkers in his pocket. He finds one more. How many conkers does he have now?
Q4.Izzy has 3 pounds in her piggy bank. She is given one more pound. How many does she have now?
Q5.Jacob has 4 conkers in his pocket. He gives one to Izzy. How many conkers does he have left in his pocket?
Q6.Izzy has 5 pounds in her piggy bank. She takes one pound out to spend. How many does she have left?
To help you plan your 1 maths lesson on: Show one more and one less than a number using representations and describe this accurately, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 1 maths lesson on: Show one more and one less than a number using representations and describe this accurately, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 1 maths lessons from the Composition of numbers 0 to 5 unit, dive into the full primary maths curriculum, or learn more about lesson planning.