Description 1) Why? The Environment (Why? English Edition) Created by a team of Harvard graduates, Why? The Human Body stands out thanks to the meticulous supervision of Ms. Jin-sil Mok, a former U.S. elementary school science teacher, and the careful editing of Harvard-educated editors Scott Lichtenstein and David Vincent Kimmel. Read the Why? English edition, then the Korean edition — and back again! The Why? English edition is a direct 1:1 translation of the Korean edition, allowing children to study both versions side by side for effective repeated learning. Through this repetition, kids can naturally absorb not only everyday conversational English but also more challenging scientific terms. 2. Science Workbook A proven workbook co-developed with McGraw-Hill, the renowned U.S. textbook publisher! Built around Yearimdang's original content, this workbook incorporates McGraw-Hill's expertise in English-language educational materials. Self-Checking Through Varied Question Types! With a range of exercises — Vocabulary, Reading Comprehension, Summary, Speaking, and Puzzle sections — children can check their understanding of the Why? English edition's content. The workbook helps reinforce key vocabulary at a level appropriate for U.S. elementary students, and includes an answer key with explanations so kids can clearly understand the meaning of each example sentence. 3. Vocabulary List A handy pocket-sized vocabulary list packed with essential words every elementary student should know! Key vocabulary from each chapter of the Why? English edition is selected and presented along with definitions and example sentences. The words are organized to follow the story flow of the Why? English edition, so children can reconstruct the storyline through vocabulary alone. Its compact size makes it easy to carry anywhere. 4. Audio CD The entire Why? English edition, brought to life across 3 audio CDs! Listen to the characters' dialogue performed with lively expression by native English-speaking narrators. With these audio CDs alone, children can experience the full content of the Why? English edition while learning accurate native pronunciation — helping to improve not just listening skills, but speaking ability as well.