Logic, not guessing
Sudoku has no arithmetic in it: it is pure reasoning. Children learn to look for the place with the fewest possibilities and to check every row, column and box, which is the same careful thinking good mathematicians use.
Picture sudoku first
Four pictures in a 4×4 grid is a gentle start for children who can’t yet hold numbers in their heads. They can draw the pictures or cut and glue them in.
Irish curriculum links
- ReasoningReasoning is one of the four elements running through every strand of the Primary Mathematics Curriculum (2023), and sudoku is reasoning without sums.
- ApplyingApplying and problem-solving, another element, asks children to pick a strategy and test it, like finding the one gap in a row.
No Irish curriculum mentions sudoku, and it isn’t part of any strand. It suits the curriculum’s elements, which describe how children think mathematically rather than what they learn, so it makes a good early-finisher task in any class.
A class sudoku challenge during Maths Week Ireland is a fun way to use the bigger grids, with the answer keys pinned up at the end of the week for checking.
Summarised in our own words from the Primary Mathematics Curriculum (2023) and the NCCA Mathematics Toolkit.
