Coordinates
In this step, participants will use the Cartesian Plane as reference to allocate the pieces and to translate them properly at GeoGebra interface. When playing the game it is necessary to click in a piece next to a blank square in order to make the piece move or slide to an empty space. To produce this effect, it is necessary to develop strategies on how to implement it. This offers an excellent opportunity to introduce mathematical concepts involving coordinates and translations.
These figrues illustrate a possible solution of such a 3x3 sliding puzzle based on the previously discussed example.