This article focuses on the IB-PYP curriculum and teachers' roles within IB-PYP. The Turkish national curriculum was used to contextualize the paper, and these two curricula have been presented comparatively. The comparison encompasses their respective scoping aims, models of curricular control, distinctive teacher roles, and assessment practices. Moreover, the study incorporates insights and viewpoints from PYP teachers who also had worked for long years in public schools following the national curricula, revealing their roles in the PYP system. Drawing from interviews with PYP teachers, this case study elucidates the contrasting approaches to establishing product-process control models within these educational frameworks, as seen through the lens of teacher roles. The analysis serves to enhance comprehension of the rationale behind the PYP programme and is anticipated to offer novel perspectives on the national curriculum. The findings from the study underscore notable disparities between the two curricula in terms of their scoping objectives, patterns of curriculum control, assessment methodologies, and teacher roles. Through the accounts and viewpoints of the interviewed teachers, it was deduced that the IB-PYP curriculum within the Didaktik perspective can serve as an inspiration for future Turkish national curricula.