A meta-analysis (435 studies, k = 994, N > 61,000) of empirical research on the effects of feedback on student learning was conducted with the purpose of replicating and expanding the Visible Learning research (Hattie and Timperley, 2007; Hattie, 2009; Hattie and Zierer, 2019) from meta-synthesis. Overall results based on a random-effects model indicate a medium effect (d = 0.48) of feedback on student learning, but the significant heterogeneity in the data shows that feedback cannot be understood as a single consistent form of treatment. A moderator analysis revealed that the impact is substantially influenced by the information content conveyed. Furthermore, feedback has higher impact on cognitive and motor skills outcomes than on motivational and behavioral outcomes. We discuss these findings in the light of the assumptions made in The power of feedback (Hattie and Timperley, 2007). In general, the results suggest that feedback has rightly become a focus of teaching research and practice. However, they also point toward the necessity of interpreting different forms of feedback as independent measures.

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The coronavirus pandemic has led to drastic measures around the world, which have also affected the education system. Schools were closed in the spring of 2020 in almost every country in the world, and many children and young people are still involved in distance learning to this day. What effect these measures have on children’s and young people’s learning performance is important in view of the time pressure under which educational policy decisions have to be taken. The rapid review presented in this paper delivers evidence on the effects of school closures to contain the coronavirus pandemic in the spring of 2020 on children’s and young people’s learning performance in five countries (USA, Belgium, the Netherlands, Switzerland and Germany).

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