In Tugboats, beginning readers will learn about the parts of a tugboat that allow it to move boats and freighters of much greater size. Vibrant, full-color photos and carefully leveled text engage emergent readers as they discover the unique features of these machines. A labeled diagram helps readers identify the parts of a tugboat, while a picture glossary reinforces new vocabulary. Children can learn more about tugboats online using our safe search engine that provides relevant, age-appropriate websites. Tugboats also features reading tips for teachers and parents, a table of contents, and index. Tugboats is part of Jump!'s Machines at Work series.