This research focuses on the use of ethical frameworks as a pedagogical model for socio-scientific education in implementing the "Science as a Human Endeavour" (SHE) strand of the Australian Curriculum: Science in a Year 10 biology class in a Christian college in metropolitan Perth, Western Australia. Using a case study approach, a mixed method data collection and action research, analyses of students' beliefs/values/attitudes and achievement outcomes in critical thinking, ethical reasoning and decision-making skills were evaluated accordingly. This research confirms that the use of ethical frameworks can be effective in engaging students and developing informal reasoning and decision-making skills.