### Other Examples:

- Children determine that they need 24 blocks to fill a rectangular prism based on a 3 x 4 x 2 net of the prism.

### Help your student become a(n) 3D Array Structurer

Activities help children understand and use a formula for the volume of rectangular prisms, V = l * w * h, because it is a meaningful way to figure out, for example, the number of cubes in a bottom layer of a container as length times width and then the number of cubes in the entire container–that number times the height. Discussions of these concepts and of spatial structuring in the children's solutions keep the formula from being only "rote."