While it is relatively easy to find information describing specific interventions, it is difficult to find information on how to develop a comprehensive intervention plan. This textbook presents a process and framework for designing interventions for individuals of all ages with ASD while staying consistent with recent special education trends, including response to intervention (RTI), evidence-based practices, and positive behavioral supports. The Ziggurat Model 2.0 is updated and expanded with the latest research and a new version of the Underlying Characteristics Checklist for Early Intervention (UCC-EI). Student Textbook Learner Objectives Learner objectives at the beginning of each chapter allow for a preview of the chapter's content, as well as what information readers are expected to understand and be able to explain after reading the chapter. Vocabulary Terms in grey boldface within each chapter serve as at-a-glance reminders of key vocabulary. The definitions for these terms are also included in the cumulative glossary in the Appendix. Chapter Summary Main points listed at the end of each chapter help readers recall the main points discussed. Chapter Review Questions Questions at the end of each chapter allow readers to check their understanding of and ability to explain the information discussed. The review questions may also be used as a study guide when preparing for tests and/or exams. Chapter Review Answers Answers to chapter review questions are presented in the Appendix for easy confirmation of the reader's own answers. Glossary An alphabetical listing of all vocabulary terms included in gray boldface within individual chapters offers a quick reference for review.