Andrews, P. and Palm Kaplan, K. 2020. 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, (Dec. 2020), 5–29. DOI:https://doi.org/10.24917/20809751.12.1.