Due to the lack of success of German students in recent program for international student assessment (PISA) studies since 2001, the question arises whether German teacher training has an impact on this performance. This publication is based on a systematic review which deals with German-language publications of various PISA-relevant areas within…

The principles of symmetry and group theory are applied to the zero-order wavefunctions associated with the strong-field t[subscript 2g][superscript 2] configuration and their symmetry-adapted linear combinations (SALC) associated with the generated energy terms are derived. This approach will enable students to better understand the use of…

Nanotechnology is viewed by those in favor of its development in two different ways, and the divide is not recent. This article describes the origins of the differing visions of nanotechnology and examines their broader impacts. The typical history of the field tells nothing about these differing visions, which perhaps misleads. At least two…