Resumo Pesquisas indicam uma multiplicidade de compreensões e usos dos conceitos de Problema e Problematização na educação em Ciências. Nesse sentido, desenvolvemos uma pesquisa a partir do planejamento de uma proposta educacional denominada "Situação de Estudo" (SE), a partir da qual buscou-se caracterizar e discutir sentidos e significados produzidos por professores sobre os referidos conceitos. Utilizando a análise textual discursiva, caracterizaram-se três sentidos e significados de problema: (a) um que expressa as totalidades - local e global; (b) outro que diz respeito ao reconhecimento do meio - problemas ambientais; e (c) um que revela a tomada de consciência de um problema ambiental. Já a problematização foi abordada como: (a) potencializadora dos processos de mudança curricular; e (b) como impulsionadora de práticas experimentais. Desse modo, a SE denota contribuições importantes ao enfatizar a necessidade da construção coletiva do currículo via (re)planejamentos e processos de (re)significação das práticas escolares.

Abstract Researches indicate a multiplicity of understandings and uses of the concepts of Problem and Problematization in science education. This paper presents a study conducted from the planning of an educational proposal called "Situation of Study," which sought to characterize and discuss senses and meanings produced by teachers about these concepts. Using a discursive textual analysis, three senses and meanings of the Problem were characterized: (a) one that expresses the totalities - local and global; (b) another that concerns recognition of the environment - environmental problems; and (c) one that reveals becoming aware of an environmental problem. Meanwhile, problematization was addressed as: (a) a process that can give potential to curricular change; and (b) as a process that stimulates experimental practices. In this way, the "Situation of Study" method offers important contributions that emphasize the need for collective construction of curriculum through (re)planning and (re)signification of school practices.

This paper presents the results of a study involving current teachers of the chemistry teaching curricular components of twelve Chemistry licentiate courses at state universities in the South and South-east of Brazil. The aim was to analyse how these curricular components can work together to address environmental issues in Chemistry teacher-training. From analysis of the interviews, it can be ascertained for example that environmental themes in the curricular components analysed are treated with differing levels of intensity and perspectives, and in some cases, have a more illustrative character regarding chemistry concepts.

The purpose of this paper is to investigate lecturers'actions and conceptions about pre-service teaching practices in chemistry. In this sense, it takes into account several theoretical references concerned with teacher education, which support the qualitative analysis of 18 interviews, gathered with 14 brazilian and 4 portuguese lecturers. Results reveal that the pre-service teaching practices in chemistry have been performed far from a technical approach, showing a paradigmatic rupture and presenting another logic related with teacher education in chemistry, which have improved the comprehension of the teachers' real practices, since these have been shaped by complex and unprescribed factors.

The purpose of this study is to investigate the reading practice of undergraduate students of Chemistry, in a State University in Brazil. More specifically, we aim at showing students' habits and experiences concerning reading. Our research questions were: 1) What is the profile of readers in an undergraduate Chemistry course? 2) What can be perceived concerning students' reading experience? Results show that students' beliefs and practices are contradictory; although reading is considered by them as fundamental, they do not seem to have solid reading habits. This points to the necessity of rediscussing some aspects of Chemistry teacher formation.

This paper focuses on the teaching development practice in the field of chemistry covering such disciplines as chemistry teaching practice, chemistry teaching instrumentation and chemistry teaching methodology and/or didactics, thereby describing and analysing the logics of the development practice and the role of teachers as well as the epistemological identity configurations (knowledges which are proper to said identity) within this discipline field.