Onshape 2025: A Power Guide for Beginners and Intermediate Users is a comprehensive textbook designed for both instructor-led training and self-paced learning. It serves as an essential resource for students, professionals, hobbyists, engineers, and designers seeking to master Onshape for 3D mechanical design. Tailored for new users and ideal for classroom instruction, this guide spans 10 chapters and 602 pages, thoroughly covering core Onshape environments, including Sketching, Part Studio, Assembly, and Drawing. With step-by-step instructions, it walks users through creating parametric 3D solid components, assemblies, and 2D drawings, making it a complete resource for mastering Onshape. More than just a tool and command manual, this textbook emphasizes key design principles alongside software proficiency. Each chapter features in-depth tutorials with step-by-step guidance for efficiently creating mechanical designs and drawings. Additionally, every chapter concludes with hands-on test drives, allowing users to explore and experience Onshape's robust and intuitive technical capabilities. Who Should Read This Book This book is designed for a wide range of users, from beginners to advanced professionals, as well as Onshape instructors. With well-structured, easy-to-navigate chapters, it offers a clear understanding of various design methodologies, Onshape's tools, and fundamental design principles.