These titles were chosen the by the Common Core State Standards Initiative team to serve as examples of what the Standards require. Titles were chosen based on complexity, quality, and range. They are intended to illustrate the breadth of texts that students should encounter in the text types required by the Standards, but do not represent a partial or complete reading list for these grades. Because of this, Booksource has created many additional sets based on the Common Core State Standards that fill in the gaps left by these exemplars.