InhaltsangabePART A: Introduction.- Chapter 0: Susanne Prediger & Angelika Bikner-Ahsbahs: Preface.- Chapter 1: Angelika Bikner-Ahsbahs, Susanne Prediger, Michèle Artigue, Ferdinando Arzarello, Marianna Bosch, Tommy Dreyfus, Stefan Halverscheid, Mariam Haspekian, Ivy Kidron, Alexander Meyer, Cristina Sabena, & Ingolf Schäfer: Starting points for dealing with the diversity of theory.- Chapter 2: Cristina Sabena: Description of the data: Introducing the session of Ciro, Gabriele and the exponential function.- PART B: Diversity of theories.- Chapter 3: Ferdinando Arzarello & Cristina Sabena: Introduction to the approach of Action, Production and Communication (APC).- Chapter 4: Michèle Artigue & Mariam Haspekian & Agnes Lenfant: Introduction to the Theory of Didactical Situations (TDS).- Chapter 5: Marianna Bosch & Josep Gascon: Introduction to the Anthropological Theory of the Didactic (ATD).- Chapter 6: Tommy Dreyfus & Ivy Kidron: Introduction to Abstraction in Context (AiC).- Chapter 7: Angelika Bikner-Ahsbahs & Stefan Halverscheid: Introduction to the Theory of Interest-Dense Situations (IDS).- PART C: Case studies of Networking.- Chapter 8: Susanne Prediger & Angelika Bikner-Ahsbahs: Introduction to networking: Networking strategies and their background.- Chapter 9: Tommy Dreyfus, Cristina Sabena, Ivy Kidron, Ferdinando Arzarello: The Epistemic Role of Gestures - A case study on networking of APC and AiC.- Chapter 10: Ivy Kidron, Michele Artigue, Marianna Bosch, Tommy Dreyfus, Mariam Haspekian: Context, milieu and media-milieu dialectic - A case study on networking of AiC, TDS, and ATD.- Chapter 11: Cristina Sabena, Ferdinando Arzarello, Angelika Bikner-Ahsbahs, Ingolf Schäfer: The epistemological gap - A case study on networking of APC and IDS.- CHAPTER 12  Angelika Bikner-Ahsbahs, Michèle Artigue & Mariam Haspekian: Topaze Effect - A case study on networking of IDS and TDS.- PART D: Reflections.- Chapter 13: Stefan Halverscheid: Beyond the official academic stage - Dialogical intermezzo.- Chapter 14: Angelika Bikner-Ahsbahs & Susanne Prediger: Networking as research practices: methodological lessons learnt from the case studies.- Chapter 15: Michèle Artigue & Marianna Bosch: Reflection on Networking through the praxeological lens.- Chapter 16: Kenneth Ruthven: From networked theories to modular tools?.- Chapter 17: Luis Radford: Theories and their networking - A Heideggerian commentary.- Appendix.- Index.