I taught Amie and James how to play using this Jigsaw Sudoku. I changed it to 4×4 squares and they figured it out. Amie did it by herself in a little over 8 minutes. James did one by himself in 51 seconds. He’s more mathematically minded, so it didn’t surprise me how easy it was for him, but I didn’t expect him to be able to do it so quickly. Now he wants a more challenging one. He’s asking me to print off a 9×9 puzzle to work on. We’ll see how he does on that.