The document provides an overview of Lucy Calkins' Units of Study writing curriculum for grades K-5. It describes the purpose and structure of the Units of Study, which are designed to provide sequenced writing instruction to students. Key aspects include a year-long curriculum divided into units for K-2 and 3-5 grades, with a focus on the writing process, research principles, and mini-lessons during daily writing workshops. Modifications for English language learners and special education students are also addressed.