This study is a potential endeavor to make an inquiry into the perceived effect of text typology on reading achievement gains among Moroccan English as a foreign language (EFL) learners. It also evinces whether strategy instruction can be an influencing variable on learners' reading achievement with regards to text type (i.e., narrative, expository). Indeed, incorporating two primary text genres (i.e., narrative, expository) in the conduct of this current research, the study is intended to substantiate any marked interrelatedness existing between text typology and reading achievement at the pre-and post-testing stages among EFL university learners. For assuring a thorough, rich investigation of this stated postulate, two sampled Moroccan EFL groups (n=113), as first-year English majors, were addressed. The obtained data were collected by means of a corpus of research instruments such as reading comprehension tests (i.e., pre-test, post-test), strategy training and reading comprehension texts (i.e., narrative, expository). The findings showcased that text genre is not a significant, influential variable on reading achievement scores among the control (n=50) and treatment groups (n=63). Finally, the study puts forward some useful implications pertaining to EFL text processing/ analysis and an explicit mention of some limitations, which encountered the undertaken study, is made.