Describes the use of Moe's Mall, a locational device designed to be used by learners, as a simple algorithm for solving mole-based exercises efficiently and accurately using dimensional analysis. (DDR)

Discusses the difficulties that some students have in understanding the concept of chemical reactions. Proposes that instructors try to consider the various difficulties during a chemistry course when students form their concepts of element conservation. (TW)

Considers the strategies of peer group review and concept mapping, both of which faculties in higher education might employ in partnership with schools to reestablish the fundamental role that subject matter knowledge has in science teaching. (DDR)

Describes how discrepant events can be employed as a viable teaching strategy. Reviews the theory of cognitive dissonance and provides examples and approaches in its resolution. Offers samples of discrepancy events and unexpected situations. (ML)

Discusses the advantages of using discrepant events in elementary school science classrooms in terms of motivation and problem solving skills. Describes the materials, procedures, and reasons behind five discrepant activities. (YP)

Points out a misconception that is reinforced in many elementary and advanced chemistry texts. Discusses the general limitations of the orbital concept. Notes misconceptions related to the transition elements and their first ionization energies. (MVL)