The document emphasizes the increasing importance of text complexity for success in college and the workplace, noting that while academic reading demands have intensified over the last 50 years, K-12 text complexity has stagnated. It explains the Lexile framework as a measurement tool for reading ability and text difficulty, advocating for selecting texts within a reader's Lexile range for optimal comprehension. Furthermore, it outlines instructional strategies to support students in navigating complex texts to improve their reading proficiency.