Finding one more and one less using representations
Lesson details
Learning outcome
You can find one more or one less using representations.
Key learning points
- Secure understanding of one more/one less using a variety of manipulatives .
- Use the stem sentence one more than... one less than...
- Identify a missing number in a sequence.
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
Getting numbers in the wrong order when completing the stem sentences with one more and one less.
Use the representations to identify and support understanding of which value is one less and which is one more.
Teacher tip
You may decide not to show all slides to the pupils. Use representations familiar to the pupils so that the focus can be on one more and one less and linking this to the counting sequence they have been rehearsing in previous lessons.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Which of the following comparative sentences is true for these blocks?
Q2.Which of the following comparative sentences is true for these blocks?
Q3.Which comparative sentence is true for this number track?
Q4.Which comparative sentence is true for this number track?
Q5.What are the numbers represented here?
Q6.What is the missing number here?
Assessment exit quiz
6 Questions
Q1.What number comes before 13 when you are counting to 20?
Q2.What number comes after 16 when you count from 20 back to zero?
Q3.What do you notice about these sticks of cubes?
Q4.How many beads are there on the first bead string?
Q5.Which bead string is one more than 15?
Q6.Which bead string is one less than 20?
To help you plan your 1 maths lesson on: Finding one more and one less using representations, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 1 maths lesson on: Finding one more and one less using representations, 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 Counting to and from 20 unit, dive into the full primary maths curriculum, or learn more about lesson planning.