ATRACTOR

To develop this program the support of Fundação para a Ciência e a Tecnologia (FCT), through a long term scholarship for work carried out in Atractor was decisive. Also important were: i) the collaboration of a secondary school teacher working full-time with Atractor, thanks to support from Ministry of education, and ii) the support of University of Porto, by making the location where the work was carried out available.

The translations into English, Italian, Spanish, German were done respectively by Gabriela Chaves, matematita, Lucía Fernández and Christian Lomp; Atractor is grateful for their cooperation. The structure of the GeCla was planned in such a way that it will be very easy to add other languages if the interest for such local versions arises.