“…In 16 studies, the effects of implementing process standards carried out by CRf (curriculum reform) were reported. While some studies investigated teachers' innovation enactment of reform ideas (e.g., Gainsburg, 2012;LaBerge & Sons, 1999;Stickles, 2011;Swars & Chestnutt, 2016), others focused on the effects for specific topics such as arithmetic or algebra (e.g., Cai, 2014; Zacharos Implementation and Replication Studies in Mathematics Education 3 (2023) 135-199 et al, 2014) or specific competences launched by the process standards in the curriculum reform, such as problem-solving and mathematical thinking (Clarke et al, 2004;Drijvers et al, 2019). The second subcategory included 15 studies investigating the effects of CR s (curriculum resources) as carriers of process standards (e.g., Charalambous & Philippou, 2010;Christou et al, 2004;Manouchehri & Goodman, 2000;Tarr et al, 2006).…”