Physics Teaching and Learning: Challenging the Paradigm, RISE Volume 8, focuses on research contributions challenging the basic assumptions, ways of thinking, and practices commonly accepted in physics education. Teaching physics involves multifaceted, research-based, value added strategies designed to improve academic engagement and depth of learning.In this volume, researchers, teaching and curriculum reformers, and reform implementers discuss a range of important issues. The volume should be considered as a first step in thinking through what physics teaching and physics learning might address in teacher preparation programs, in-service professional development programs, and in classrooms.To facilitate thinking about research-based physics teaching and learning each chapter in the volume was organized around five common elements:1. A significant review of research in the issue or problem area.2. Themes addressed are relevant for the teaching and learning of K-16 science3. Discussion of original research by the author(s) addressing the major theme of the chapter.4. Bridge gaps between theory and practice and/or research and practice.5. Concerns and needs are addressed of school/community context stakeholders including students, teachers, parents, administrators, and community members.