Sudoku in the classroom
Every puzzle on this site has a classroom mode for a projector or smartboard. It hides everything except the puzzle, makes the grid as large as the screen allows and uses thick black lines and high contrast. There are no ads anywhere on the site, and no login or student data.
Open a puzzle in classroom mode
Mini sudoku 4×4Good first puzzle for young pupilsMini sudoku 6×6The next stepSudoku easyClassic 9×9Killer sudoku easyPractise adding upKakuro smallSums and logic
How it works
- Press Classroom mode under any puzzle, or use the links above. Press Esc or Exit classroom mode to go back.
- Tap or click a square, then a number. Pupils can come to the board and take turns.
- Check marks wrong digits in red, and Hint fills in one square, which helps when the class is stuck.
- Killer sudoku and kakuro are good practice for addition: the cages and runs are small sums.
Printing worksheets
For paper copies, use sudokuprint.app, which has printable sudoku for different levels and for kids.