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Publikation No Loss, No Gain? COVID-19 school closures and Swiss fifth-graders' competencies and self-concept in mathematics(Hogrefe, 21.06.2023) Compagnoni, Miriam; Rechsteiner, Beat; Grob, Urs; Bayer, Nicole; Wullschleger, Andrea; Maag Merki, KatharinaCOVID-19-related school closures in spring 2020 interrupted learning routines and posed a great challenge for students' competencies acquisition and self-concepts. Concerns about possible learning losses due to school closures, especially for disadvantaged students, are justified, but the currently available empirical evidence is still scarce, varies greatly with regard to context, and neglects reciprocal effects of competencies and self-concept. To address these shortcomings, this paper first provides insights on the effect that the 8 weeks of school closures had on Swiss primary school students' math competencies. IRT-based math tests were used to cross-sectionally compare data from 1,299 students in Grade 5 in late spring 2020 shortly after the reopening of schools with data from a previous year's cohort ( n = 11,314) using propensity score matching. The results revealed no significant differences in math competencies and no evidence of an increase in inequality when children with not German (vs German) as their first language were studied. Second, changes in math self-concepts in the school year 2019/20, when the pandemic first hit, as well as reciprocal effects of math competencies and math self-concept were assessed longitudinally ( n = 1,299) using random intercept cross-lagged panel models based on three measurement points. Results showed that higher math self-concept and positive change in math self-concept over the time of school closures were related to higher learning gains. Different development trajectories for children with German (vs not German) first language emerged. The study therefore fosters a better understanding of the effect that pandemic-induced school closures had on learning and relativizes the feared negative effects on math competencies caused by short school closures.01A - Beitrag in wissenschaftlicher ZeitschriftPublikation Longitudinal changes in Swiss adolescent’s mental health outcomes from before and during the COVID-19 pandemic(MDPI, 02.12.2021) Ertanir, Beyhan; Kassis, Wassilis; Garrote, ArianaThis study aimed to explore changes in mental health outcomes (depression, anxiety, home, and school stress) from before the first COVID-19 wave (autumn 2019) to the later stages of the same wave (autumn 2020) in a sample of N = 377 Swiss adolescents (Mage = 12.67; 47% female. The results showed that the expected impact of the pandemic on mental health was not noticeable in the later stages of the first COVID-19 wave. Only two effects were demonstrated in terms of intra-individual changes, namely, an effect of gender on depression and anxiety symptoms and an effect of reported COVID-19 burden on school stress symptoms. Moreover, few associations were found for selected predictors and students’ mean level scores, averaged across both time points.01A - Beitrag in wissenschaftlicher ZeitschriftPublikation Innovating teaching and instruction in turbulent times. The dynamics of principals’ exploration and exploitation activities(Springer, 24.05.2022) Pietsch, Marcus; Tulowitzki, Pierre; Cramer, ColinIn turbulent environments, schools have to adapt to constantly changing conditions. According to ambidexterity theory, whether they are successful in this primarily depends on their leaders and how they manage the tension between the use of current knowledge (exploitation) and the search for new knowledge (exploration). Through unique top-down and bottom-up pathways, they thus influence the innovation outcome of a school. However, it is so far unclear whether these assumptions are correct. Using data from a panel of principals who are representative of Germany and were surveyed before and during the COVID-19 pandemic, we therefore investigate if and how school leaders adapted to the turbulent environment caused by the pandemic and evaluate the extent to which this had an impact on their schools’ innovations in teaching and instruction. The results demonstrate that principals’ exploration activities increased markedly during the pandemic, while their exploitation activities decreased noticeably. Further, a focus on the use and refinement of existing knowledge in comparatively predictable (pre-COVID-19) environments harmed principals’ readiness to explore new knowledge in increasingly uncertain environments. Nevertheless, exploitation had positive consequences for the innovativeness of schools, and exploration goes along with more radical innovations in teaching and instruction. Our research suggests that schools that innovatively addressed the COVID-19 pandemic had school leaders who were able to quickly shift between the two modes of exploitation and exploration. A capacity to transition seamlessly between these modes of thinking and working thus appears to be vital for the longevity of schools.01A - Beitrag in wissenschaftlicher Zeitschrift