Learn STEM topics and fractions while engaged in reading about the advancements being made with 3-D printing! This grade 4 math reader describes how 3-D printing technology is being used and developed by doctors to help patients. It uses real-world examples to teach math skills like adding and subtracting fractions. The challenging practice problems, graphs, and sidebars provide many opportunities for students to practice their developing math skills, and apply what they’ve learned to their daily lives. Text features include captions, a glossary, an index, and a table of contents to increase students’ vocabulary and literacy skills and their interaction with the text. Math Talk poses problems for further thinking, requiring students to use their higher-order thinking skills.