Precedir, observar, explicar e indagar : estrategias efectivas en el aprendizaje de las ciencias Authors Gisela Hernández Millán Norma Mónica López Villa Abstract Predict, observe, explain and explore: effective strategies in science learning. Generally, practical work is not included as part of the teaching strategies of Mexican science teachers at secondary school level due to, among other factors, the school infrastructure. To promote the incorporation of this type of activity, we developed four experiments with materials of easy acquisition, using POE and inquiry methodologies. In addition to the learning of the concepts, this proposal allowed the development of fundamental skills in science. Downloads Text complet (Català) Published 2012-03-08 Issue No. 09 (2011) Section Formació del professorat License The intellectual property of articles belongs to the respective authors.On submitting articles for publication to the journal Educació Química, authors accept the following terms:Authors assign to Societat Catalana de Química (a subsidiary of Institut d’Estudis Catalans) the rights of reproduction, communication to the public and distribution of the articles submitted for publication to Educació Química.Authors answer to Societat Catalana de Química 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 Química 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.Educació Química is not responsible for the ideas and opinions expressed by the authors of the published articles.