The introduction of ethics is already seen by students as an important part of their education and connects school science and technology with the worlds in which they live. It has the potential to connect directly with their concerns and the issues that they consider important. The introduction of ethics, rather than being another area of content to be 'learnt', can also be used as a framework to enhance students' thinking skills. In developing ideas about, and approaches to, ethical thinking an important aspect then is to develop conceptual frameworks of how students make progress in ethical thinking.