During the 20th century, many things were invented that made people's lives easier. Vacuum cleaners and washing machines made doing chores easier. Vaccines and penicillin improved public health. Radio and telephones helped communication, and airplanes and automobiles transformed transportation. Featuring TIME For Kids content, this Spanish nonfiction reader details the history of 20th century inventions, and discusses their importance to the modern world. This high-interest title includes detailed photos and sidebars, stimulating facts, historical timelines, and clear, informational text to engage students as they build their critical literacy skills. The book includes text features such as a table of contents, glossary, and an index to increase understanding and improve academic vocabulary. The Reader's Guide and Try It! sections provide extensive language-development activities that will prompt critical thinking. Aligned with state and national standards, this text prepares students for college and career. Keep grade 3 students reading from cover to cover with this intriguing text.