The document discusses congruent shapes and how to determine if two shapes are congruent. It defines congruent as "same size, same shape" and provides examples of congruent pairs of classroom items. Students are asked to visualize what makes shapes congruent, list congruent classroom items, and identify congruent shapes in the classroom. The document emphasizes that for shapes to be congruent, they must be the same size and shape when laid over each other.