Ben Nussbaum 
Engineering Marvels: Roller Coasters [PDF ebook] 
Dividing Fractions

Join Elizabeth and Zachary as they celebrate their birthday at an amusement park. Along the way, find out more about the different types of roller coasters. These rides use lifts, twists, loops, and gravity to deliver big-time thrills. Learn everything you’ve ever wanted to know about roller coasters as you practice dividing fractions. This book seamlessly integrates the teaching of math and reading, and uses real-world examples to teach math concepts. Text features include images, a glossary, an index, captions, and a table of contents to build students‘ vocabulary and reading comprehension skills as they interact with the text. The rigorous practice problems, math charts and diagrams, and sidebars extend learning and provide multiple opportunities for students to practice what they have learned. The Math Talk section provides an in-depth problem-solving experience.