National Geographic Footprint Reading: Tornado Chase + DVD

Description & Features of National Geographic Footprint Series: Welcome to the sights and sounds of the world with the Footprint Reading Library, a unique new series of graded readers for learners of English. This series offers fascinating stories from the four corners of our world, and develops the language and skills needed to understand non-fiction writing. * A rich selection of engaging non-fiction readers, grouped into five themes: Incredible Animals, Fascinating Places, Remarkable People, Exciting Activities, and Amazing Science. * One hundred individual readers, graded at eight levels from pre-intermediate to advanced, covering 800 to 3,000 headwords. * Each reader is available with a DVD-ROM containing both video and audio content for that reader. * Carefully-controlled grammar syllabus covers the most typically-taught structures in coursebooks. Tornado Chase: Tornadoes are large storms that can cause huge amounts of damage and destruction. Most people run from tornadoes, but some researchers chase them! They want to study the storms to develop better methods for predicting them. How do they find these tornadoes? How do they collect their information?