The Teaching and Learning International Survey (TALIS) is the world's largest international survey of teachers and principals. In 2024, TALIS added the Teacher Knowledge Survey (TKS), a special module to investigate teachers' general pedagogical knowledge (GPK). GPK is the specialised knowledge of teachers for creating effective teaching and learning environments for all students, independent of subject matter; it is part of the specialised body of knowledge that makes teaching a knowledge profession. The TKS conceptual and assessment framework underpins the survey, describes its contents and explains its importance. Key themes in the framework include teaching diverse learners, using technology for teaching and supporting social and emotional learning.