Obtained results from the project showed among primary school children a remarkable effectiveness of health education on the improvement of knowledge and the change of behavior in prevention and control of intestinal worm infection, by which the re-infection situation was noticeable improved; the increase of body weight and height of the children in the deworming group is statistical significal higher than the control one. Yet, this improvement is not enough to make the dewormed children catch up the well-nourished population; effectiveness of deworming on improvement of their ability to learn is not found.