The product is a new, sealed textbook titled “Units of Study in Opinion, Informational, and Narrative Writing” by Lucy Calkins. Published in 2016, this textbook provides instructional units for teaching writing skills in grades K-5. It includes a variety of formats such as ring/wire bound and trade paperback, making it versatile for different teaching needs. With a focus on opinion, informational, and narrative writing, this textbook offers practical guidance and resources for enhancing writing instruction in the classroom.