This paper argues that psychology has an important role for practicing teachers. Firstly, it is important that they keep their knowledge of best teaching and learning practices updated; psychology is a continually evolving field of research and whilst some traditional aspects may remain compelling even today, others are no longer seen as valid, thus updating of the knowledge gained during initial training should be seen as essential for all practicing teachers. Secondly, the current emphasis on evidence-based teaching and the need for teacher-led research, highlight a need for understanding the research methods used in education, which again psychology at postgraduate level can deliver. Finally the challenges of teaching psychology to practicing teachers are discussed.