Back ground and Aim: According to the UNICEF’s Conceptual Model the behavior of those who somehow play a role in taking care of children significantly influences children’s growth as a feedback. Anthropometrical indices such as weight and height for age Z (HAZ and WAZ) are extensively utilized to determine malnutrition and growth rate.

  Materials and Methods: In a quasi experimental study, three girls’ junior high schools -randomly selected from the fourth educational district in Shiraz- were assessed with regard to heights, weights, and age utilizing EPI software. After HAZ and WAZ were measured, girls whose HAZ and WAZ were less than (-1) were included in the study. Mothers of these girls were invited to participate in a weekly training program on health, nutrition, and exercise/activity at school. Five months after the beginning of the program, the subjects were weighed, their height re-recorded, and HAZ and WAZ were re-measured. Girls of three similar schools from Educational District No 3(which was economically similar to No 4) were selected as the control group (CG), but mothers of these girls were not trained during this time, and all the relevant indexes were measured both at the beginning and at the end of the period of five months. Finally, the obtained data was analysed by means of linear trend in ratios, statistical paired-t, and independent t at the significant level of P≤0.05.

  Results: Significant growth (P=0.038) of WAZ, but an insignificant result regarding HAZ (P=0.34) were observed such changes were not significant among the CG. Transferring the girls under study from the area with severe/ moderate malnutrition to the area having slight malnutrition was proved to be significant during the period (P<0.05).