Kompetenzorientierung- Probleme lösen: Vermittlung mathematischer Kompetenz und Anleitung zu eige...

Kompetenzorientierung- Probleme lösen: Vermittlung mathematischer Kompetenz und Anleitung zu eige...

For the author, writer and observer isolated as all of us were, the year's challenges quickly led...

For the author, writer and observer isolated as all of us were, the year's challenges quickly led...