Before moving to the University of Oldenburg, I held a professorship for didactics of subject teaching at the University of Bielefeld for several years. My research focussed on the following areas:

1. Historical learning in subject teaching - here I am also continuing research in Oldenburg (see Ongoing research: Early historical learning).
2. New conceptualisation of social science perspectives for non-fiction teaching with a focus on historical learning, political learning, consumer education and mobility education
3. Methodological orientation in non-fiction teaching
4. Internet project sachunterricht-online.de
5. I have also founded and published a series of books with the main aim of preparing the most important findings of the related disciplines of non-fiction teaching in such a way that students, trainee teachers and teachers in service receive assistance in familiarising themselves quickly and competently with key subject areas. This is particularly necessary in subject teaching because, in view of its diversity, only an in-depth insight into a few specialised aspects is possible when studying subject teaching. On the other hand, knowledge of essential questions, content, methods and results of the numerous other related sciences (specialised sciences and subject didactics) is necessary for the implementation of responsible science-oriented subject teaching, if everyday knowledge and everyday theories are not to be declared sufficient prerequisites for lesson preparation and implementation. The book series entitled "Dimensionen des Sachunterrichts" was published by Schneider Verlag Hohengehren. I wrote and edited the first three volumes on political learning, historical learning and methods in subject teaching myself. I have since handed over the series to my colleague Markus Peschel, as I have not been working full-time in subject teaching for some time now; it is now published under the slightly different title: "Kinder. Things. Worlds. Dimensions of non-fiction teaching". In 2017, however, I updated two of my own three books and rewrote or edited them.

• See Ongoing research: Early historical learning

• Dietmar von Reeken: Politische Bildung im Sachunterricht der Grundschule, in: Wolfgang Sander (ed.), Handbuch politische Bildung, 3rd completely revised edition Schwalbach/Ts. 2005, pp. 184-195
• Dietmar von Reeken: Verkehrserziehung und Mobilitätsbildung, in: Wolfgang Einsiedler et al. (eds.), Handbuch Grundschulpädagogik und Grundschuldidaktik. 2nd revised ed. Bad Heilbrunn/Obb. 2005, pp. 684-689
• Dietmar von Reeken: Learning politics in primary school - political education as an object of subject teaching, in: kursiv - Journal für Politische Bildung 3/2003, pp. 24-29
• Dietmar von Reeken: Politisches Lernen im Sachunterricht: Didaktische Grundlegungen und unterrichtspraktische Hinweise, Baltmannsweiler: Schneider Verlag Hohengehren 2001 (= Dimensionen des Sachunterrichts, Vol. 1)
• Dietmar von Reeken: Verkehrserziehung und Mobilitätsbildung, in: Wolfgang Einsiedler et al. (eds.), Handbuch Grundschulpädagogik und Grundschuldidaktik, Bad Heilbrunn 2001, pp. 611-615
• Dietmar von Reeken: Schimanski a German? Cultural plurality in the German past and its treatment in the classroom, in: Sache Wort Zahl 27/2000, pp. 42-47
• Dietmar von Reeken, Volker Schwier: Critical shopping pleasure. Perspectives on consumer education in general studies, in: Grundschulunterricht 2/2000, pp. 23-28
• Dietmar von Reeken, Volker Schwier and Claudia Hoppe: Children and consumption. Dimensions of integration in subject teaching and some consequences for teacher training, in: Gerhard Löffler, Volker Möhle, Dietmar von Reeken, Volker Schwier (eds.): Sachunterricht - Zwischen Fachbezug und Integration, Bad Heilbrunn: Klinkhardt 2000, pp. 185-200
• Dietmar von Reeken: From danger defence to risk awareness: Mobility education instead of road safety education, in: Sache Wort Zahl 26(1998), H. 16, pp. 36-40
• Dietmar von Reeken: Religion in subject lessons? Plurality, intercultural education and the question of meaning, in: Lernen in Deutschland. Journal for Intercultural Education 17(1997), pp. 134-144

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• Dietmar von Reeken: Methodenorientierung im Sachunterricht - Überlegungen am Beispiel des historischen Lernens, in: Marlies Hempel (ed.), Sich bilden im Sachunterricht, Bad Heilbrunn 2004, pp. 153-162
• Dietmar von Reeken (ed.): Handbuch Methoden im Sachunterricht. Baltmannsweiler: Schneider Verlag Hohengehren 2003, updated new edition 2017
• Dietmar von Reeken: Methoden im Sachunterricht, in: Ders. (ed.), Handbuch Methoden im Sachunterricht, Baltmannsweiler: Schneider Verlag Hohengehren 2003, pp. 3-11
• Dietmar von Reeken: Observation, in: Ders. (ed.), Handbuch Methoden im Sachunterricht, Baltmannsweiler: Schneider Verlag Hohengehren 2003, pp. 39-46
• Dietmar von Reeken: Working with films, in: Ders. (ed.), Handbuch Methoden im Sachunterricht, Baltmannsweiler: Schneider Verlag Hohengehren 2003, pp. 97-106
• Dietmar von Reeken: Learning for the "knowledge society"? A plea for a stronger methodological orientation in general knowledge teaching, in: Joachim Kahlert, Elke Inckemann (eds.), Wissen, Können und Verstehen - über die Herstellung ihrer Zusammenhänge im Sachunterricht, Bad Heilbrunn: Klinkhardt 2001, pp. 71-82

• Volume 1: Dietmar von Reeken: Politisches Lernen im Sachunterricht. Didactic principles and practical teaching tips, Baltmannsweiler 2001
• Volume 2: Dietmar von Reeken: Historisches Lernen im Sachunterricht. An introduction with tips for the classroom, Baltmannsweiler 2004, updated new edition 2017
• Volume 3: Dietmar von Reeken (ed.), Handbuch Methoden im Sachunterricht, Baltmannsweiler 2003. Updated new edition 2017