Teie, quina estora vols? Trobar la millor proposta Authors Montserrat Canet Abstract This activity was carried out during the 2015-2016 academic year at the MaríaMercè Marçal de Mataró School, based on an observation of fourth-year primary school students: when they saw that school children had to sit on the floor in music class, they decided to find a solution to the problem. An Internet search found Paviplay, a systemof soft interlocking floor tiles that uses safe and healthymaterials and offers fungicidal and bacterial protection. Paviplay would allow the entire surface to be covered, and could be easily removedwhen not needed. The project gave us opportunities for cross-disciplinary and collaborative work. In the area of mathematics, activities covering all curricular units were carried out. In terms of language, both oral and written expression were employed, in arguing the proposals made, discussing them, finding solutions, reaching agreements, and presenting proposals. Finally, it was necessary to present a formal proposal before the School Council and to defend it, and teamwork was essential throughout the entire process. Downloads Download data is not yet available. Downloads Text complet (Català) Published 2019-11-21 Issue No. 44: juny 2019 Section Articles License The intellectual property of articles belongs to the respective authors.On submitting articles for publication to the journal NouBiaix, authors accept the following terms:Authors assign to Societat Catalana de Matemàtiques (a subsidiary of Institut d’Estudis Catalans) the rights of reproduction, communication to the public and distribution of the articles submitted for publication to NouBiaix.Authors answer to Societat Catalana de Matemàtiques for the authorship and originality of submitted articles.Authors are responsible for obtaining permission for the reproduction of all graphic material included in articles.Societat Catalana de Matemàtiques declines all liability for the possible infringement of intellectual property rights by authors.The contents published in the journal, unless otherwise stated in the text or in the graphic material, are subject to a Creative Commons Attribution-NonCommercial-NoDerivs (by-nc-nd) 3.0 Spain licence, the complete text of which may be found at https://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.en. Consequently, the general public is authorised to reproduce, distribute and communicate the work, provided that its authorship and the body publishing it are acknowledged, and that no commercial use and no derivative works are made of it.NouBiaix is not responsible for the ideas and opinions expressed by the authors of the published articles.