Each unit of Reading Explorer contains two reading passages and an optional video activity. Reading passages cover a wide range of real-world topics related to culture, science, social studies, travel, and adventure. Publisher: National Geographic/(ELT); 001 edition (March 23, 2010) Language: English ISBN-10: 1111057109 ISBN-13: 978-1111057107 Product Dimensions: 0.8 x 5.5 x 7.5 inches Link Download http://nitroflare.com/view/162DC5117DA317E/ http://nitroflare.com/view/67A31C047F442DD/ http://sachviet.edu.vn/threads/reading-explorer-6-levels.29092/https://nitroflare.com/folder/949760/L00VuZ2xpc2g=