Read and discover all about wonderful ecosystems on Earth ... How are polar bears adapted to living in a frozen ecosystem? What are decomposers?This exciting new series of non-fiction readers provides interesting and educational content, with activities and project work. The readers are graded at four levels, from 3 to 6, suitable for students from age 8 and older. They can support Content and Language Integrated Learning (CLIL), and covera broad range of topics, within three curriculum areas:The World of Science and TechnologyThe Natural WorldThe World of Arts and Social StudiesAlso available for each reader:* Activity Book* Audio CD Pack (Reader and Audio CD)* Teacher's Notes and CLIL guidance at www.oup.com/elt/readanddiscoverThe Activity Book includes 16 pages of chapter-linked activities followed by after-reading whole book activities and a book review; focus on content, vocabulary, and grammar.