Mercy currently teaches pre-service and in-service courses in educational psychology. She is the course coordinator for the in service course: Engaging Parents: A Practical Approach. She also works with in-service pre-school teachers, teaching the NEL framework and the NEL MTL framework courses. Her formal training and experience as a classroom teacher had inspired her interest in learning more about the social and emotional development of young children. Her Master's dissertation explored children's criteria in selecting peers in a local preschool. Her PhD dissertation explores parent-child relationships in impoverished single mother homes in Singapore. Her other research interests include matters of social justice, diversity and multiculturalism as practiced in the local context.