The objective is to fill the 9x9 grid so that each column, row, and each of the nine 3x3 boxes contain digits from 1 - 9. Numbers can not be repeated in each column, row or box. Use the or in a colour other than black to fill in the grid.
If your students have no experience with Sudoku, I suggest starting them off with a 6x6 grid. Although the title states ‘easy’, it is still hard for the inexperienced. This is an easy 9x9 Sudoku.