This work provides a characterization of the learning of graph theory through the lens of the van Hiele model. For this purpose, we perform a theoretical analysis structured through the processes of reasoning that students activate when solving graph theory problems: recognition, use and formulation of definitions, classification, and proof. We…

There is considerable variation in the dynamical literature in how the term "complexity" is used. While there have been several attempts to describe from an educational perspective what complexity encompasses, the term is frequently used without an explicit definition. To forge a shared understanding of what complexity means, the purpose…

Three studies focused on: (1) the definition of structure in a specific domain of knowledge; and (2) the relationship between the ways in which knowledge is structured and the ways in which it is used. Evidence suggested that the knowledge of expert children is structured hierarchically into well-defined families and family-groups. (RH)

Reviews the concept of rational suicide and compares it with one researcher's list of commonalities of suicide. Claims that the list cannot accommodate rational suicide. Suggests that the list is biased against rational suicide and should be renamed so it cannot be maintained that suicide must be irrational. (RJM)

The second of two linked articles develops two more mapping typologies: first, an approach to the what, why, and how of leaders, leading, and leadership; and second, the presentation of possible positions that knowledge workers can take when they use and produce knowledge about leadership practice. (Contains 10 notes and 73 references.) (MLF)

The first of two linked articles discusses leadership and associated concepts. Outlines and illustrates a mapping typology built around five knowledge domains (conceptual, critical, humanist, evaluative, and instrumental) and seven factors (purpose, focus, context, method, audience, communication, and impact). (Contains 9 notes and 93 references.)…