**Abstract**

Reviewing the history of clinical educational curricula reveals enormous change and progress through successive antiquity up-to the current 21th century. Surely, there are stable fundamental criteria which are pillars in designing any curriculum; however there are torrential inevitable reforms which are important in filling the changeable gaps and fulfilling the ecological and temporal aspects. Over the last 20th century, numerous new paradigms for curricula reforms were constructed to adapt ebullient millennium needs, interactive pedagogical approaches and psychological/sociological learning theories. These reforms fostered clinical practice, integrating core competencies and reflection on designing, and achieving clinical curricula depending on outcome-based models such as clinical competences milestones. On the other hand, systematic approach of Kern's framework adopts curriculum development through six consecutive interlinked and intersected steps which are refined to eight steps later. Moreover, taking contextual factors into account during curricula planning was evolved in other models such as PRISMS model. Despite all these pearly efforts, there are still caveats about inclusive gaps negligence between education process and overall health system. 3P-6Cs toolkit is deemed a recent novel paradigm that enrolls this role of health systems in clinical training during curricula design.

**Keywords:** medical education, curriculum reforms, 21th century, history, curriculum, criteria, types, clinical training, Kern's framework, PRISMS, 3P-6Cs
