This document contains lessons from an English textbook about classroom objects and describing their sizes. It includes vocabulary words for common classroom items like books, pens, rulers, and erasers. It also provides examples of asking and answering questions about the size of objects using phrases like "Is it big?" and responding with "Yes, it is" or "No, it isn't, it's [size]." There are practice exercises for students to ask and answer questions about the size of different classroom objects.