The authors of the article analyze modern approaches to forming functional reading literacy in teaching the Russian language in middle school within the context of realization of the principle of continuity, which serves the foundation of the education process. It is the authors' purpose in this article to draw attention to the issue of forming functional reading literacy of students, to identify specific characteristics of their reading activity at one of the most difficult stages of learningat the stage of transition from elementary to middle school. Based on contemporary methods of academic research, completed experiments and school teaching experience, the authors arrive at the conclusion that functional reading literacy is an essential element of general human culture, an element that is especially necessary for schoolchildren's adaptation to an ever-changing world and for realization of the principle of continuous education. This research resulted in methodological solutions proposed by the authors of this article as a way to form functional reading literacy based on the principle of continuity. The study reveals the most important skills that a school student of today needs in elementary and middle school, and identifies effective ways of forming functional literacy in high school. The article is addressed to special subject teachers, school administrators, methodologists, researchers in the field of education, as well as textbook and curriculum developers.