Part 1: Theory and Practice -- What is Design Research in Education -- History of Design Research in Education Intermezzo 1: A Fictive Dialogue between two Research Approaches -- Design Principles, Conjecture Mapping, and Hypothetical Learning Trajectories -- Research Questions in Design Research -- Research Quality in Design Research -- Argumentative Grammars used in Design Research -- Writing an Empirical Design Research Paper -- Supervising Design Research in Education Examples -- Teaching Design Research as a Case of Cultivating a Community of Professional Practice -- Harvesting Ecosystem Dynamics Through a Computational Model of a Garden -- Giant Steps for Algebra -- Explicit Oral and Written Reasoning During Science Argumentation -- An Embodied Approach to Derivatives -- Building Bridges: Uniting Students, Researchers, and Teachers to Improve a Course -- Easy Equilibrium: Discovery in an Introductory Chemistry Course -- Rearview Mirrors for the "Expert Blind Spot" : Usign Design to Access Surgeons' Tacit Knowledge and Create Shared Referents for Teaching -- Children's Reasoning about Animal Lifecycles: Tradeoffs Across Four Different Designs -- Linking Design and Theory: Using Conjecture Maps to Focus the Design Research Process in Art Education -- Literary Education with Narrative Digital Games: From Formulating Research Equestions to Capturing the Design Rationale -- From Implementer to Co-Designer: A Teacher's Changing Role in a Design Research Project -- Using Hypothetical Learning Trajectories in Design Research -- Reflection and Wish List.