Smartphones have transformed the way we live. Many people feel dependent on their smartphones. Some people spend too much time using them. But how much time is too much? This nonfiction book discusses the pros and cons of smartphones while introducing students to new vocabulary terms and concepts. Important text features include a glossary, index, and table of contents to engage students in reading as they develop their comprehension, vocabulary, and literacy skills. The Reader's Guide and culminating activity direct students back to the text as they develop their higher—order thinking skills. Check It Out! provides resources for additional reading and learning. With TIME For Kids content, this book aligns with national and state standards and will keep grade 4 students engaged in reading.