As technological advancements continue to revolutionise the realm of education, use of technology in both K-12 and university classrooms paves the way for making flipped classroom a trending pedagogical model. Flipping a course simply means reversing a traditional model of in-class lecture followed by practice and homework. Research has shown that use of flipped classroom holds promise for students' success and satisfaction as long as curricular activities of a flipped course are designed and sequenced through some steps depending on tenets and nature of flipped classroom as well as principles of instructional design models. This study aims to shed light on some considerations for designing content, pedagogy, materials, delivery, and assessment prior to flipping a course. Each step in the process of flipping a course is therefore explicated through a systematic review of 78 studies that focus on implementations of flipped classroom in K-12 and university classrooms.