Tackle today's toughest races while learning fractions! Marvel as contestants around the world climb, crawl, run, and jump through the world's toughest marathons and obstacle courses. This book combines mathematics and literacy skills, and uses practical, real-world examples of problem solving to teach math and language arts content. Students will learn fractions while engaged in reading high-interest content. The glossary, index, and table of contents will further understanding of reading and math concepts, and the full-color images, practice problems, and math graphs and charts make learning math easy, practical, and fun. The Explore Math sidebars and Math Talk problems will develop students' higher order thinking skills, and also provide additional opportunities for students to apply what they've learned.