ChileLearning about what to do during an earthquake which includes identifying the 'safe zone' in the school. The mathematical task includes different ways to calculate the area of the 'safety zone' and if it is sufficient for the number of students in the classes that the zone caters to.
The figure is an L-shaped figure.
This is suitable for primary level when students are learning area of composite figures (comprising of rectangles).
e-textbook format allows
(1) teachers to pull out the template of the L-shaped figure and discuss the methods students use to calculate the area
(2) teachers and students to show the unit square grid to confirm that their calculation is correct by 'counting squares' method