The key idea of shape at level 2 is that objects can be sorted by their geometric properties.
At level 2 students are increasingly aware of the parts of shapes rather than seeing all shapes as a whole and are extending the vocabulary that they use to describe them. For example, they will be using “sides”, “corners”, “faces”, “edges”, “larger”, “smaller”, “round” to describe their groups. Knowing the names for some of the main groupings of shapes such as triangles, quadrilaterals and hexagons is an aspect of sorting at this level.
This key idea develops from the key idea of shape at level 1 where the focus is on the appearance of shapes, rather than their attributes.
This key idea is extended in the key idea of shape at level 3 by an increased understanding that types of shapes can be defined by their geometric properties.