Sustainable development has become ubiquitous in science, culture, and social diaspora. It is a complex concept, based on environmental, economic, and social pillars. Since mono-disciplinary approaches typically fail to teach the sustainability education of the present generation, multiple educational approaches are required to overcome sustainability challenges. The purpose of this paper is to investigate the approaches to educating sustainable development among the students of Kerala to develop their sustainability consciousness. This study is qualitative and descriptive. Teachers of science, social sciences, and mathematics are the focus of this study. The information was gathered using interview sheets and a questionnaire. According to the findings, the result demonstrates that although 83% of the teachers are familiar with sustainable development, they do not have a precise understanding of the concept. However, educating sustainable development can be done in three ways. Those approaches are curricular, co-curricular, and digital. The curricular method is better for 42% of teachers, the cocurricular approach for 33%, and the digital approach for 17%. Educating about sustainable development is difficult for 8% of teachers. The findings of this study can serve as a recommendation for the curriculum development process of the school’s sustainable development-focused syllabus.