Reading is an essential skill for students to perform effectively and successfully in any academic setting. This skill is vital for foreign language learners as it provides chances for students to be exposed to English in input-poor settings. English as a foreign language students' reading skills in diverse contexts remain substandard due to the lack of necessary input and efficient instructional methodologies. Thus, we review the literature on three common reading instructional approaches: the intensive reading (IR) approach, the extensive reading (ER) approach, and the blended IR and ER approach. This review summarizes the existing literature on IR, ER, and blended IR and ER and provides the critical appraisal of existing scholarly literature from several aspects, including reading approach, research design, research context, data analysis method, and the results of various studies of reading approaches. Finally, we present several future research directions in the field of reading research.