Teachers’ Pedagogical Beliefs : Definition and Operationalisation Connections to Knowledge and Performance Development and Change How are teachers’ pedagogical beliefs and their professional knowledge related How do teachers’ pedagogical beliefs affect their work in the classroom Do future teachers’ pedagogical beliefs evolve during training How are these beliefs defined and operationalised in current empirical researchThis work provides an in depth empirical examination of different aspects of teachers’ pedagogical beliefs. The authors are recognised experts in their respective fields from the US Germany Ireland and Switzerland. The contributions cover a broad range of issues distinguishing between in service and pre service teachers examining the results of national surveys and international comparisons of teachers’ pedagogical beliefs and making use of different methodologies when it comes to operationalisation and measurement. The findings are essential reading for researchers in the fields of education and psychology pre service and in service teachers and teacher trainers. How are teachers pedagogical beliefs and their professional knowledge related How do teachers pedagogical beliefs affect their work in the classroom Do future teachers pedagogical beliefs evolve during training How are these beliefs defined and operationalised in current empirical research This work provides an in depth empirical examination of different aspects of teachers pedagogical beliefs. The authors are recognised experts in their respective fields from the US Germany Ireland and Switzerland. The contributions cover a broad range of issues distinguishing between in service and pre service teachers examining the results of national surveys and international comparisons of teachers pedagogical beliefs and making use of different methodologies when it comes to operationalisation and measurement. The findings are essential reading for researchers in the fields of education and psychology pre service and in service teachers and teacher trainers.