Book excerpt: A companion to Aspects of Teaching Secondary Science, the first section of this reader provides an overview of the key issues, discussing the nature of science and its role in the school curriculum. The second section goes on to examine critically the ways in which science is reflected in the school curriculum, while the third section discusses recent curriculum initiatives and developments. Turning the focus from what is taught on to who is taught, section four shows that students are very much active learners in the classroom, making sense of their experiences and constructing their own meanings. The final section covers the role of research in science education, giving examples of research papers and considering how productive collaboration between teachers and researchers can impact upon the effectiveness of classroom practice.