Introduction -- 1- Experiments as building blocks of knowledge. Gorazd Planinšič -- 2- Active learning methods and strategies to improve student conceptual understanding: some considerations from Physics Education Research. Claudio Fazio -- 3- Primary, Secondary and University pre-service teacher Education in physics. Marisa Michelini -- 4- Primary, Secondary and University Pre-service Physics Teacher Education - What scientific education is relevant for becoming a physics teacher in a technological world? . Knut Neumann -- 5- Concerns about relevant Physics Education in a Technological world: An overview of GIREP participants' questions. M. Gabriela Lorenzo -- 6- Didactical reconstructions in knowledge organization and consolidation in physics teacher education. Terhi Mäntylä -- 7- Examining students reasoning in physics through the lens of the Dual Process Theories of Reasoning: The context of forces and Newton's laws. Mila Kryjevskaia and Nathaniel Grosz -- 8- Critiquing explanations in physics: Obstacles and pedagogical decisions among beginning teachers. Laurence Viennot and Nicolas Decamp -- 9- Design tools as a way to explicitly connect research insights with design decision for teaching learning sequences. Jenaro Guisasola, Kristina Zuza, Jaume Ametller and Mikel Sagastibeltza -- 10- Results of a Design-Based-Research study to improve students' understanding of simple electric circuits. Jan-Philipp Burde & Thomas Wilhelm -- 11- Teaching particle-wave duality with double slit single photon interference in Dutch secondary schools. Ed van den Berg, Aernout van Rossum, Jeroen Grijsen, Henk Pol, Jan van der Veen -- 12- Eye-movement study of mechanics problem solving using multimodal options. Jouni Viiri, Jasmin Kilpeläinen, Martina Kekule, Eizo Ohno and Jarkko Hautala -- 13- Derivatives, integrals and vectors in introductory mechanics: the development of a multi-representation test for university students. Marta Carli, Stefania Lippiello, Ornella Pantano, Mario Perona and Giuseppe Tormen -- 14- Research-based innovation in introductory physics course for biotechnology students. Daniele Buongiorno and Marisa Michelini -- 15- Physics students' understanding of quantum mechanics: a Rasch analysis. Italo Testa, Umberto Scotti di Uccio, Arturo Colantonio, Silvia Galano and Irene Marzoli -- 16- Using theory to inform practice in the advanced physics classroom. Ramón E. Lopez, Mikel A. Greene and Ximena Cid -- 17- Development of preservice teachers' sense of agency. Michael M Hull and Haruko Uematsu -- 18- Is participation in Public Engagement an integral part of shaping physics students' identity? . Claudia Frachiolla, Brean Prefontaine and Kathleen Hinko -- 19- Enhancing the teaching and learning of physics at lower second level in Ireland. Deirdre O'Neill and Eilish McLoughlin.