Participants already can count from 1 to 9. 10.3 Sudoku Objectives Participants already can count from 1 to 9. They know that there are 9 single digit numbers from 1 to 9 Order, write and compare numbers from 1 to 9 You learn to combine 9 numbers between 1 and 9, you find missing numbers or you eliminate double numbers. One learns to observe and apply mathematical rules. Tools, Materials and Organisation Each player gets one Sudoku board (3 by 3 small fields combined to 81 fields). The Sudoku playing field must be prepared, because not every number combination is possible. You can use different websites to produce Sudoku playing fields (see useful hints) The Sudoku game is a solitary game, you play it alone. The lesson takes 45 minutes. First you explain the rules, then the participants can play one or more games. Please start with easy Sudoku playing fields.

Description of the Lesson First part of the lesson (5 minutes): 10.3 Sudoku Description of the Lesson First part of the lesson (5 minutes): Explain the game Sudoku. Use the work sheet for the students for this explanation. Each single student gets his own work sheet. Edit the worksheet together. Second part of the lesson (40 minutes): Each participant gets his own work sheet. Each participant fills his Sudoku field. When it is finished, the teacher checks the solution. In case of difficulties the teacher may help the participant. It is important that all participants find the right combination of numbers from 1 to 9.

Sudoku Generator in the Internet: Useful Hints The game SUDOKU is related to the rules a very easy game, but it can be very complicated during playing. Sudoku Generator in the Internet: https://www.kompf.de/sudoku/generator.html http://www.websudoku.com/ http://www.opensky.ca/~jdhildeb/software/sudokugen/

Add possible missing numbers: 10.3 Sudoku 4 Add possible missing numbers: 1 4 7 8 4 1 3 6 1 2 3 5 7