To test the hypothesis that a higher tendency to "s"pontaneously "f"ocus "o"n "m"ultiplicative "r"elations (SFOR) leads to improvements in rational number knowledge via more exact estimation of fractional quantities, we presented sixth graders (n = 112) with fraction number line estimations and a…

In this investigation, we examined how youth during learning conversations at an informal science education camp negotiated and authored identities as learners of science. Using identity theory as our analytical lens, we investigated by application of qualitative methodology the socially constructed nature of youth's identities. We focused on the…

This study investigated whether and, if so, how metacognitive knowledge can be assessed validly in students with special educational needs in a large-scale assessment like the German National Educational Panel Study. In total, 804 sixth-grade students including both regular school students attending the lowest track of secondary education…

Arguing on the computer was used as a method to promote development of face-to-face argumentation skills in middle schoolers. In the study presented, sixth graders engaged in electronic dialogues with peers on a controversial topic and in some reflective activities based on transcriptions of the dialogues. Although participants initially exhibited…

This paper discusses the effects of children's exposure to violence against their mothers. It particularly considers the sided-effects of this violence on the children's behaviour, self-image and school performance. The research indicates that (1) violence against women victimises not only the mothers but also their children, even if the children…

Teaching students to use and interpret representations in science is critically important if they are to become scientifically literate and learn how to communicate their understandings and learning in science. This study involved 248 students (119 boys and 129 girls) from 26 grade 6 teachers' classes in nine primary schools in Brisbane,…

High-quality measures of instructional practice are essential for research and evaluation of innovative instructional policies and programs, as well as for providing feedback to teachers and administrators. In this study, the authors examined whether using anchoring vignettes in web-based surveys improved the validity of teachers' self-assessments…