產品介紹How do birds fly? How do jet engines move a plane? Find out more about helicopters, gliders and the science of flying.In the Air, a Level 2 Reader, is A1 in the CEFR framework and supports YLE Movers exams. Short sentences contain a maximum of two clauses, introducing the past tense and some simple adverbs.系列介紹跟著 BBC Earth一起探索動物與大自然的神秘世界▌讀本融入探究式教學概念（ inquiry-based approach ），每一跨頁均透過「主題問句」先引導孩子主動思考，再輔以實例、多元活動增進學習深度與廣度。▌全系列共四級（L1-4），每級九本。每本清楚標示Lexile級數及Word count。▌每本除提供non-fiction文本外，亦有圖解單字、互動式延伸活動（Find Out, Think, Watch, Project, Look）及讀後小考。▌每級數句構與時態運用及詞彙表達皆參考Cambridge YLE題型，讓孩子從閱讀中學習主題知識，同步培養必備語言、溝通力及探究力。
