The cluster of papers in this Special Issue, contains some results from the Science Teacher Training in an Information Society (STTIS) project, which was funded by the European Commission. Five European universities were involved: Université Denis Diderot-Paris 7 (France), Università 'Federico II da Napoli' (Italy), University of Oslo (Norway), Universitat Autònoma de Barcelona (Spain), and the University of Sussex (UK). The names of those involved are given in the Appendix. The following brief description of the aims and structure of the project sets the work reported here (in this cluster) in the context of the whole project. The project dealt with general questions and challenges that the Information Society poses to science educators.