Former STEM educator Nathan D. Lang-Raad has witnessed the power of interdisciplinary teaching in K-12 schools. In this book, he details nine specific habits of thinking and a challenge-based framework that educators should systematically integrate to promote students' academic knowledge and lifelong learning. Lang-Raad's approach consolidates supportive research and gives clear guidance through original strategies to help teachers design lessons that foster necessary behaviors. This book will help K-12 teachers, instructional coaches, and curriculum designers: (1) Understand why the nine habits of thinking must be embedded and applied across all grade levels; (2) Use a detailed challenge-based framework template to design and perform interdisciplinary lessons; (3) See how historical polymaths' practices can apply to and enhance 21st century learning; (4) Complete chapter activities to ensure the habits are appropriately incorporated for all developmental stages and grade bands; and (5) Study research-supported examples of the habits' and the framework's successful application.