This QTN aims at enhancing teachers’ professional capacity for integrating knowledge, skills, attitude and action into the learning and teaching of Liberal Studies (LS). In addition to developing students’ knowledge and skills, exploratory activities and practical applications will be arranged in the LS curriculum for students’ internalisation of values and the concept of sustainable development learned. The project will arrange activities to enhance teachers’ understanding of issue-inquiry learning so as to foster students’ critical thinking skills and positive values. Collaborative lesson planning, observation and review of lessons will be arranged to enhance teachers’ professional development.