In this paper, the authors analyse the conceptual contents related to plant nutrition in the widely-used school texts of six Spanish publishers. An analysis dossier was elaborated based on the epistemological and pedagogical study of this subject. The publishers deal with the issue of plant nutrition at three different levels (multicellular,…

Examines the knowledge that secondary school students have concerning some basic aspects related to the location of inheritance information before they are taught about genetics. Discusses the effects of traditional instruction in Spain on students' learning. (Author/CCM)

Reports on some potential teaching problems associated with children's scientific ideas about the concept of mutation. Provides information on the sample, methodology of study, and analysis. Concludes that in biology teaching the treatment of the concept must ensure that its genetic sense is specifically delineated. (RT)