Interactive Hundred Square
Explore counting patterns, place value, skip counting, odd and even numbers, multiples, factors, decimals and percentages with a clear interactive 100-square grid. Best used in full screen mode! ⭐️ Best used in full screen mode!
Teacher Notes
Curriculum Links
This tool supports the Number strand of the Irish Primary Mathematics Curriculum, especially work in counting, place value, number patterns, skip counting, odd and even numbers, and number relationships. It is most suitable for Senior Infants – 3rd Class, with useful links into older classes for factors, multiples, primes, square numbers, decimals and percentages.
Children can use the Hundred Square to:
count forwards and backwards, recognise number patterns, explore place value, identify odd and even numbers, practise skip counting, investigate multiples and factors, make jumps of 1, 10 or more, and connect hundredths with decimals and percentages.
Lesson Ideas
Number Hunt
Call out a number and ask children to find it on the hundred square. Encourage them to explain how they located it using rows, columns, tens and ones.
Skip Counting
Highlight every 2nd, 5th or 10th number and ask children to describe the pattern. Extend this by exploring multiples such as 3s, 4s, 6s or 9s.
Odd and Even Numbers
Use two colours to highlight odd and even numbers. Ask children what they notice about the pattern in the columns and how they can predict whether a number is odd or even.
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