Editorial comments

This Special Issue of Computer Science Education is comprised of six invited papers reporting research originating from the work previously presented at the Koli Calling 2005 Conference on Computer Science Education, held in November 2005 in Koli, Finland. The selected conference papers were completely re-written and re-reviewed for the Special Issue, and they include new material such as new data, novel results, as well as elaborated analysis and discussion. Some papers include supplementary material, which can be found at the Koli Calling website at http://cs.joensuu.fi/ kolistelut. Koli Calling 2005 was organized by the Turku Centre for Computer Science (TUCS) and the University of Turku, Finland, with local arrangements by University of Joensuu, Finland. The conference was the fifth in a series of events, first held in 2001 as a meeting for university scholars sharing an interest in computer science education and computer science education research. The conference is open to the international computing education research community. The goal of the Koli Calling conference series is to promote the exchange of relevant scientific information and the dissemination of best practices between colleagues working on the same discipline, to combine practical teaching and learning experiences with solid research orientation, and to encourage evidence-based educational methodology and technology development, building upon an open-minded dialogue between the computing and educational disciplines. The authors of the invited papers have been able to incorporate into their current submissions the original comments and suggestions by the Koli Calling Program Committee, the constructive feedback received during the conference and, finally, the comments by the Special Issue reviewers. I would like to thank all the reviewers for their valuable contribution and the Editors of Computer Science Education for providing the opportunity for publishing this compilation. I hope that you will enjoy reading the articles and find them inspiring for your work towards our common goal, improving computer science education.