Amazon.com description: Product Description: Reading Explorer is a six-level content-based reading series featuring video from National Geographic to help develop reading and vocabulary skills for all learners. 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. * Motivating real-world content supported by stunning visuals help develop learners' understanding of the wider world in which they live. * Reading passages develop visual literacy, and incorporate graphic organizers, to help learners become better readers of English. * Reading Comprehension activities cover essential reading skills and question types commonly found on standardized tests. * Vocabulary Practice activities and Vocabulary Builder boxes present and reinforce high-frequency vocabulary items. * Video from National Geographic motivates students and aids in visual learning.