Learn how designers and engineers work together to plan and build some of the world's most incredible thrill rides.Calling All Innovators series introduces students to careers in science and technology. The complex text allows readers (Grades 5-8) to determine the main idea and explain how it is supported by key details. With their giant drops and twisting loops, roller coasters have been thrilling people for decades. These exciting rides give passengers a taste of danger, but thanks to the careful work of roller coaster designers, they are as safe as can be.