**4. The assessment of the depth of knowledge reached during the Aha! Moment insight**

The definition of bisociation, whose cognitive content is to construct a connection between two unconnected frames of reference or matrices of thought, suggests the theory of the schema understood as the network of concepts to be the tool with the help of which we can trace the developmental aspect of the insight. DoK in this case will be the progress in understanding the relevant concept or the difference between student understanding of the mathematical situation before and after the insight. The Aha! Moments analyzed below are taken from the Collection of Aha! Moments in [4]. We established there three levels of DoK, namely mild, normal and strong.
