Follow the rumble of engines at work! Explore the parts and uses of side-by-sides at work on the farm. Simple callouts ask the student to think in new ways, supporting inquiry-based reading. Titles in the 21st Century Beginning Library introduce students to vocabulary and content they will use for a lifetime as they are prompted to Look, Think, and Connect. Let your young readers discover the joy of reading for information as they grow into lifelong, fluent readers.