Why do this problem?
In this challenge
, the key is visualisation. It is required in two ways: to plan ahead (in other words - if I put this triomino here, will I be able to fit another one in easily?); to turn the triomino in their ''mind's eye'' in order to decide which orientation is needed for a particular gap.
As pupils tackle this problem, they should be encouraged to devise a system for filling the grid without leaving any gaps. This may not come easily to some and you might need to bring their attention to spaces that cannot be filled.
How can you fit just two triominoes together without leaving any gaps between them?
Where might be a good place to put the first triomino?
Children might enjoy having a go at the Covering the Camel
A good starting point is to ask children to fit just two triominoes together without leaving a gap between them. This might help some to visualise more easily how the pieces could be fitted into the grid and to explain why some grids might be impossible to fill.