Crossing the tens boundary counting forwards
I can count forwards from 1 to 100, crossing the tens boundary
Crossing the tens boundary counting forwards
I can count forwards from 1 to 100, crossing the tens boundary
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Lesson details
Key learning points
- The numbers from 0 to 100 have patterns that can help us to count across the tens boundary.
- They are arranged differently on a number track and on a one hundred square.
- We can count the numbers in two ways.
- When a whole number ends in a 9, it is always followed by a decade number.
Keywords
Tens boundary - This is where the pattern of counting changes at the start of the number to show a new decade has started.
Decade number - This is a multiple of 10 which marks the tens boundary where the pattern of counting changes.
Common misconception
Confusion between the number after 29, 39 etc. so saying 29,20 or twenty-none, twenty -ten.
Explicitly look at the numbers that follow a number ending in 9 using stem sentence to support.
To help you plan your year 1 maths lesson on: Crossing the tens boundary counting forwards, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 1 maths lesson on: Crossing the tens boundary counting forwards, 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.
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Explore more key stage 1 maths lessons from the Pattern in counting from 20 to 100 unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
Licence
Lesson video
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Starter quiz
6 Questions
3 tens 5
5 tens 3
2 tens 8
8 tens 2
Exit quiz
6 Questions
40
50
60
