Nature makes its mark with sights such as the Grand Canyon and the Great Barrier Reef. But other landmarks are built by people. Add and subtract your way around the world as you discover the stories behind some breathtaking buildings and massive monuments. This nonfiction math reader builds literacy skills and math content knowledge, combining informational text, problem-solving, and real-world connections to help students explore math in a meaningful way. The Let's Explore Math sidebars feature clear charts and diagrams that make learning the concepts easy and fun. The Problem-Solving activity enhances the learning experience and promotes mathematical reasoning, and the Math Talk section provides critical thinking questions to help facilitate rich discussions while developing students speaking and listening skills. Text features include content-area vocabulary, dynamic images, a table of contents, a glossary, an index, and an answer key. Aligned to state and national standards, this high-interest title will engage students in reading and learning. This 6-Pack includes six copies of this title and a lesson plan.