Lao Cai is a province has 25 ethnic groups, of which the H'Mong ethnic proportion of 22.21 percent. H'Mong people have their own spoken and written languages, more H'Mong community often live clustered together in each village children and adults often communicate with each other in the H'Mong language, rarely communicate in English. This causes them to face many difficulties in the learning process at school. To help them overcome the difficulties, language barriers, cultural identity preservation ethnic Lao Cai Department of Education and Training and the Vietnam Institute of Science Education held a pilot bilingual teaching based on base language. So far, after two years, has obtained the good results.