Anat Levav developed an approach based on the presumption that solving
mathematical problems in different ways may serve as a double role tool - didactical
and diagnostic. She described a tool for the evaluation of the performance on multiple
solution tasks (MST) in geometry. The tool is designed to enable the evaluation of
subject's geometry knowledge and creativity as reflected from his solutions for a
problem. The example provided for such evaluation is taken from an ongoing largescale
research aimed to examine the effectiveness of MSTs as a didactical tool.