These texts were specifically chosen by Booksource to support fourth grade-level instruction based on the Common Core State Standards for English Language Arts and Literacy in History/Social Studies, Science, and Technical Subjects. The range of selected texts includes books from various genres (RL.4.5), stories and myths from different cultures (RL.4.9 and RL.4.4), texts that allow for in-depth study of story elements (RL.4.3), and various informational texts on the same topic (RI.4.9 and RI.4.6).