World Class is a new, two-level series for high-intermediate and advanced English language learners. This integrated-skills program uses National Geographic content, images, and video to help learners expand their overall fluency while developing the tools and strategies necessary for effective, real-world communication. Learners understand the world through stunning images, engaging readings, and fascinating video from National Geographic. Learners are motivated to connect the thematic content to their lives which inspiring critical thinking. Teachers and learners have tangible, relevant goals in every unit.