Patterns in the hundreds chart
Down a column every number grows by ten; along a row, by one. Filling in missing numbers makes children use those patterns instead of counting from 1 every time.More counting
Try skip counting and number lines.Irish curriculum links
- InfantsStage 1 Sets and operations: adding and taking away can be shown as a move on a number line or 100 square, the name the curriculum uses.
- NumerationThe continuum includes counting to at least 100 across the decades, and counting forwards and backwards in tens from any number.
- Place valueEach column of the square shows ten more, the base-ten idea at the heart of Stage 2 place value.
In Irish classrooms this chart is usually called the 100 square, and the NCCA toolkit uses that name too. A big one on the wall gets daily use in the infant classes and in 1st and 2nd Class, for counting, spotting patterns and adding or taking away ten.
Missing-number charts make a quick daily task. In a multi-class room, give the younger group a missing-numbers chart and the older group a skip counting chart, so both work on the same picture of number at their own level.
Summarised in our own words from the Primary Mathematics Curriculum (2023) and the NCCA Mathematics Toolkit.
