“…T A B L E 2 Descriptive statistics level-2 variables for the USA students. Our results confirm the strong impact on science achievement by students bullied at school, school composition by student background, home educational resources, and attitude toward learning (Cairns & Dickson, 2020;Caponera & Losito, 2016;Dahl & Lochner, 2012;Davis-Kean's, 2005;Karlsson, 2022;Mishna et al, 2010;Mohammadpour et al,2015;Sandoval-Hernández & Białowolski, 2016;Tokunaga, 2010;Wiberg & Rolfsman, 2019;Yalcin et al, 2017). On the other hand, we find that most instructional strategy predictors have little effect on mean science achievement, with the exception of students work in the same ability group.…”