Teaching Computer Image Processing Subject to Middle School Students: Cognitive and Affective aspects -- Analyzing Conceptual Content of International Informatics Curricula for Secondary Education -- It’s computational thinking! Bebras tasks in the curriculum -- Comparing the Performance of Girls and Boys in Bebras Challenge -- Attitudes towards Computer Science in Secondary Education: Evaluation of an Introductory Course -- Typifying Informatics Teachers’ PCK of Designing Digital Artefacts in Dutch Upper Secondary Education -- Students’ Success in the Bebras Challenge in Lithuania: Focus on a Long-term Participation -- What Makes Situational Informatics Tasks Difficult -- A New Informatics Curriculum for Secondary Education in The Netherlands -- And Now What Do We Do with Our Schoolchildren -- Defining and Observing Modeling and Simulation in Informatics -- K-12 Computer Science Education Across the U.S -- Combining the Power of Python with the Simplicity of Logo for a Sustainable Computer Science Education -- A new interactive Computer Science textbook in Slovenia -- Computer Science in the eyes of its teachers in French-speaking Switzerland -- IT2School - Development of Teaching Materials for CS through Design Thinking -- ”Why Can’t I Learn Programming?” – The Learning and Teaching Environment of Programming. .