Abstract: In recent years, constructivism is regarded as one of the great ideas in education. Its implications for the way teachers teach and learn how to teach are enormous. If our efforts to reform education for all are to be successful, then we must focus on the student. By far, the focus on student-centered learning may be constructivisms most important contribution. Therefore, within this article, constructivist learning theory is discussed as a paradigm of teaching and learning at high schools in Vietnam. Constructivism is a learning theory found in psychology that explains how people can acquire knowledge and learn, thereby directing application to education.