Daniel Tröhler is Professor at the Faculty for Language and Literature, Humanities, Arts and Education at the University of Luxembourg. He is editor and annotator of the critical edition of the complete letters written to Pestalozzi, chief editor of the journal Zeitschrift für pädagogische Historiographie [Journal of the Historiography of Education]. His research interests include the analysis of educational and political languages, republicanism, pragmatism, and methodological problems of historiography. Thomas S. Popkewitz is Professor and former Chair in the Department of Curriculum and Instruction, The University of Wisconsin-Madison, USA.  His studies in the US and comparatively are concerned with the systems of reason that govern educational reforms and research in teaching, teacher education and the sciences of education.   David F. Labaree is a professor and associate dean for student affairs in the Stanford University School of Education (USA).  His research focuses on the history of American education.  He was president of the History of Education Society (USA) in 2004-2005 and vice president for Division F (history of education) of the American Educational Research Association (2003-06).  His books include: The Making of an American High School (1988), How to Succeed in School Without Really Learning (1997), and The Trouble with Ed Schools (2003).