"Next Generation Science Standards" identifies the science all K-12 students should know. These new standards are based on the National Research Council's "A Framework for K-12 Science Education." The National Research Council, the National Science Teachers Association, the American Association for the Advancement of Science, and Achieve have partnered to create standards through a collaborative state-led process. The standards are rich in content and practice and arranged in a coherent manner across disciplines and grades to provide all students an internationally benchmarked science education. The print version of "Next Generation Science Standards" complements the nextgenscience.org website and: (1) Provides an authoritative offline reference to the standards when creating lesson plans; (2) Arranged by grade level and by core discipline, making information quick and easy to find; (3) Printed in full color with a lay-flat spiral binding; and (4) Allows for bookmarking, highlighting, and annotating. The following are appended: (1) Conceptual Shifts in the Next Generation Science Standards; (2) Responses to the Public Drafts; (3) College And Career Readiness; (4) "All Standards, All Students": Making the Next Generation Science Standards Accessible to All Students; (5) Disciplinary Core Idea Progressions in the Next Generation Science Standards; (6) Science and Engineering Practices in the Next Generation Science Standards; (7) Crosscutting Concepts in the Next Generation Science Standards; (8) Understanding the Scientific Enterprise: The Nature of Science in the Next Generation Science Standards; (9) Engineering Design in the Next Generation Science Standards; (10) Science, Technology, Society, and the Environment; (11) Model Course Mapping in Middle and High School for the Next Generation Science Standards; (12) Connections to the Common Core State Standards for Mathematics; and (13) Connections to the Common Core State Standards for Literacy in Science and Technical Subjects. (Individual chapters contain references.) [The content of this document was prepared by NGSS Lead States.]