Primary students (K-2): shapes, logical thinking
Intermediate students (3-5): shapes, equality, logical thinking
The intent here was to see if students would recognize that one triangular pyramid was equal to the weight of the sphere and cube.
"One side has 3 shapes with the other side has 2 shapes."
"3 pyramids; 1 sphere; 1 cube; and they are all 3-D."
"It's a scale. The left side has three shapes and the right side has two shapes."
"The square and the circle are the same weight as one triangle. s + c = t"