Sudoku puzzles are excellent tools for building students’ critical thinking skills. Students use numbers to help them fill in the blank squares so that each number, 1 to 9, appears in every Column, Row, and Block of the completed puzzle.
Visit these sites for free Sudoku puzzles:
The Daily Sudoku http://www.dailysudoku.com/sudoku/
Puzzles.ca https://www.puzzles.ca/sudoku/
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