This book, drawn from the practical experience of the European Assess Inquiry in Science, Technology and Mathematics Education (ASSIST-ME) project, aims to support researchers, teacher educators and teachers in navigating the complex nature of formative assessment.

Michel Grangeat is Professor Emeritus of Educational Sciences at University of Grenoble Alpes, France. Michel's research focuses on the activities of professionals in the field of human relations and in collective contexts. The activities studied are those aimed at improving the well-being, development and learning of individuals, whether adults or children.

Christine Harrison is Professor of Science Education at King's College London, UK. Her research focuses on teachers' conceptualisation of classroom assessment and particularly how Assessment for Learning pedagogy is implemented in STEM classrooms. Her research studies enable her to work alongside teachers through a close-to-practice approach that both learns from and informs practice.

Jens Dolin is Professor Emeritus of Science Education at University of Copenhagen, Denmark. He has a broad research portfolio in the learning and teaching of science with foci on development of students' science competences and bildung, especially through cross-curricular education. The last decade the assessment aspects have been central together with addressing and involving policy stakeholders in the educational processes.

Foreword: Developing Formative Assessment in STEM Classrooms Introduction: Exploring assessment in STEM inquiry learning classrooms 1. Forms and functions of on-the-fly formative assessment conversations in physics inquiry lessons 2. French teachers' informal formative assessment in the context of inquiry-based learning 3. Making learning effective - quantity and quality of pre-service teachers' feedback 4. Analysing formal formative assessment activities in the context of inquiry at primary and upper secondary school in Switzerland 5. Development of teachers' perspective on formative peer assessment 6. The what, when & how factors: reflections on classroom assessment in the service of inquiry