The document introduces Derek Chirnside, a physics professor from the University of Canterbury in New Zealand, who is giving a talk on interactive teaching strategies in physics. It provides an overview of his background in teaching mathematics, science, and physics. It discusses his realization that a more interactive approach was needed and his discovery of physics education research. The talk aims to share research-based interactive teaching strategies that have helped students in many classes, while acknowledging the need to adapt them to the local context in China.