Andrews, Paul, and Kristina Palm Kaplan. “PISA, TIMSS and Swedish students’ Knowledge of Linear Equations: A ‘telling’ Case of a System Fixing Something That May Not Be Broken”. Annales Universitatis Paedagogicae Cracoviensis | Studia ad Didacticam Mathematicae Pertinentia 12 (December 31, 2020): 5–29. Accessed November 21, 2024. https://didacticammath.uken.krakow.pl/article/view/8417.