A selection of grids on Powerpoint which can be used for learning competitions.
staircase, noughts & crosses board, 4 in a row, shark-infested water, football field, racetrack.
Except for the staircase, which can be used 'live' in presentation mode, the grids are best used with Powerpoint in edit (write) mode. This is so that you can write on the background or move shapes around.
A pdf version of this resource is also available if you want to copy backgrounds onto Smartboard pages.