This book constitutes the refereed proceedings of the 6th International Conference on Informatics in Schools: Situation, Evolution, and Perspectives, ISSEP 2013, held in Oldenburg, Germany, in February/March 2013. The 15 full papers included in this volume were carefully reviewed and selected from 48 submissions; in addition the book contains two keynote talks in full-paper length. The contributions are organized in topical sections named: from computer usage to computational thinking; algorithmic and computational thinking; games; informatics in the context of other disciplines; and competence-based learning and retention of competencies.