The study process was designed, using the ecological model, in three stages; Stage one: Need assessment stage (pre-intervention, March-Jun 2011): A semi-structured interview was used with all 14 school principals, and a structured self-administered questionnaire was used with all teachers. A random sample of a 4th and 5th grade classes was selected, in which all mothers and their daughters were eligible to answer a self-administered questionnaire. The height and weight of the children were measured during this stage. These measurements were the baseline for assessing the current situation. In addition to school inspection tours was done to assess the school's health environment.