In a development and research project over a period of three years, with classes 8 to 10 in school, the aim was to develop students' competence to use computer tools. The aim was that the students should be able to judge what ICT tools are appropriate to use for a specific task. Seven classes with six teachers took part in the project. In a working period in the final part of the project the students work were observed, and afterwards they were given a questionnaire about their experiences in the work, what tools they chose to use and why. The results indicate that about half of the students could make reasonable choices and give appropriate reasons for their choice. [For complete proceedings, see ED496848.]