In this study, we examine the connections between real analysis concepts and secondary mathematics content. This is accomplished by conducting a textbook analysis of a commonly used real analysis textbook. Concepts from the real analysis textbook were mapped to the Common Core State Standards-Mathematics (2010) to determine the relationship between real analysis and high school mathematics. The results of this textbook analysis suggests that several connections between real analysis and high school mathematics do exist with a particular emphasis on functions. Implications, limitations, and future research are also discussed.