Some research has investigated the efforts of varying theform of representation of an assessment response. As a meansof assessing students' ability to communicate mathematically,the California Assessment Program (Pandey, 1988) has pilotedmathematics situations that require them to write a paragraphor a set of directions. The Shell Centre for Mathematical Education(Swan, 1987) has directed students to write about asituation and produce other forms of representations, such asdrawing a graph or diagram.