Why do a books Lexile level and GRL not agree?
A. The reason for differences between Lexile levels and GRLs is that they measure slightly different things. A Lexile is a unit for measuring text difficulty, focusing on the two variables of semantic difficulty and syntax. GRLs take other factors into consideration, such as complexity of story structure, spacing, and conceptual elements. If a book has advanced vocabulary but little text and story structure, it may have a very high Lexile and a low GRL, and vice versa. Please note that no teacher, parent, or librarian will use only ONE scoring system to assign books to a specific child or young adult. Each score measures different elements and, along with a books description (i.e. the blurb/annotation) and its tags (especially any sensitivity issues), help to create a complete picture of the value of the book and quiz in various situations (curriculum, enjoyment, independent reading, shared reading, etc).
