“…Dusenbury et al (2003) define curriculum fidelity as the extent to which teachers faithfully implement the curriculum as planned by curriculum development experts. In the literature, other definitions of the concept of curriculum fidelity are expressed as follows: integrity and quality of implementation (Dane & Schneider, 1998), how close the curriculum is to its design, how well, and how faithfully it is implemented compared to the designed curriculum (Century et al, 2010;Furtak et al, 2008;Mihalic, 2002;Pence, et al, 2008;Ruiz-Primo, 2005), the compatibility between the designed curriculum and the implemented curriculum (Yaşaroğlu & Manav, 2015), the similarity between the targeted and implemented forms of the curriculum (Bay et al, 2017), and implementing official curricula written and adhering to the criteria determined during the implementation phase of the curriculum (Arslan- Çelik & Gelmez-Burakgazi, 2021). When the definitions are examined, it is important to determine the curriculum fidelity in terms of the extent to which a designed curriculum is implemented, especially by teachers, by adhering to the original, how much the targeted outputs of the curriculum are achieved, which problems are encountered during implementation, and thus to examine whether the curriculum is implemented effectively (Karakuyu and Oğuz, 2021).…”