Series Name: Red Rhino Nonfiction3D printing has made some fascinating developments in recent years. It has been around since the 1980s, but technology has improved dramatically. Now, 3D printers are used in business, medicine, cooking, fashion, and more.Engage your most struggling readers in grades 4-7 with Red Rhino Nonfiction! This new series features high-interest topics in every content area. Visually appealing full-color photographs and illustrations, fun facts, and short chapters keep emerging readers focused. Written at a 1.5-1.9 readability level, these books include pre-reading comprehension questions and a 20-word glossary for comprehension support.