If Vietnam wants to apply foreign curricula, it can import textbooks in natural sciences and technology. However, the structure of educational systems around the world is quite different and developed countries change curricula every five to seven years, according to Professor Nguyen Minh Thuyet, chief editor of the national curricula compilation committee. The draft curriculum for general education opened for public opinion by the Ministry of Education and Training has raised controversy. Many people have criticized the curriculum, saying it cannot ease the workload of students. They said it would be better to apply foreign curricula to Vietnamese schools.