Science is for all students in all countries; and this is a principle of equity. An explicit aim of science education is to create a high level of scientific literacy so that students have a greater understanding of science content knowledge that is associated with life, the physical world and earth sciences. As 21st century citizens, it is essential to use our scientific literacy and knowledge to address issues like environmental protection and sustainable development of our nation, region and our world. A survey was completed by 60 educators from the ASEAN region concerning their perceptions of their identity as regional and global citizens, the factors that contribute to such perceptions, the issues for which they would advocate and the roles that science and/or math education has played to bring about their realizations as regional and global citizens. Several respondents provided suggestions on how Global Citizenship Education (GCE) may be embedded in math and science education. From the survey conducted, the author recommends the use of science education to serve as a platform for GCE in countries where GCE is not in the curriculum, and the extension of our lesson plans to bring awareness of the responsibilities of global citizenship that include caring for our environment, human rights, peace, equality and sustainable development.