For a sustainable future, equipping sustainability change agents with relevant sustainability competencies is crucial. Among these competencies is system thinking competence -- the understanding of complex interrelationships among the dimensions of sustainable development and the impacts of the interrelationships. Learning approaches relevant to…

Background: This article reports contributions of an assessment tool called Portfolio of Evidence (PE) in learning college geometry. Material and methods: Two classes of second-year students from one Ethiopian teacher education college, assigned into Treatment and Comparison classes, were participated. The assessment tools used in the Treatment…