I neglected to update on this project!
From our 'trash' cereal boxes and other similar boxes, my class created little pyramids. They were required to cut 4 equilateral triangles and one square out of the cardboard, then assemble these pieces into a pyramid.
The students who read the instructions and measured their triangles and squares- actually managed to assemble their pyramids.
Those who just cut mindlessly were unable to get their pieces to fit.
The lesson here---follow instructions!