Count groups of 10 in decade numbers
Lesson details
Learning outcome
I can recognise when to count in tens and use my decade numbers to find out how many there are altogether.
Key learning points
- You can count groups of 10 in two ways.
- You can count groups of 10 using decade numbers.
- You can look at the digit before zero to find out how many tens are in a decade number.
Keywords
Group - Objects that are gathered together in a set can be said to be in a group.
Decade numbers - These are the multiples of ten which mark the tens boundary where the pattern of counting changes.
Represent - The word represent tells you what something is worth or what it means or tells you.
Common misconception
When objects are in 10s, children may count the number of tens rather than the amount altogether.
Introduce errors involving confusion between the number of tens and the amount altogether for children to reason about.
Teacher tip
Explore objects from children's immediate environment in the lesson. Use the slides to simply aid lesson design and delivery. Beyond the lesson, group/store familiar objects around the room in tens so children can recognise and count as part of daily activities.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.This is not 1 group of 10 because __________
Q2.Which picture is representing 1 ten?
Q3.How many tens can you see?
Q4.Match the groups of 10s to the number of tens they represent.
Q5.Which image shows 4 tens?
Q6.How many tens can you see?
Assessment exit quiz
6 Questions
Q1.This number ends in 0. This tells me that it is a number.
Q2.How many tens are in this picture?
Q3.How many pizza slices are there altogether?
Q4.Which picture shows 40?
Q5.Look at the number 90. What does the 9 represent?
Q6.Match the numbers that represent the same amount.
To help you plan your 1 maths lesson on: Count groups of 10 in decade numbers, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 1 maths lesson on: Count groups of 10 in decade numbers, 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 in tens - decade numbers unit, dive into the full primary maths curriculum, or learn more about lesson planning.