The intervention is based on the principles of the teaching of the ancient Greek philosopher Pythagoras. These principals set a basic framework for behavior on the basis of experiential learning and weekly evaluation of the implementation of 12 virtues. The technique is practiced twice a day(before night sleep and in the morning before getting up from bed) and evolves into five successive steps;1)reading of the 12 virtues and diaphragmatic breathing, 2)recall every event og the day,3)third person visualization and self-observation, 4)self-dialogue "What have I done wrong?", "What have I done right?", "What have I omitted that I ought to have done?" Endorsement or disapproval of actions according to the 12 virtues and the instructions for a healthy lifestyle, 5) next morning brief revision of the previous night's conclusions and setting of goals for the upcoming day.

The intervention is based on the principles of the teaching of the ancient Greek philosopher Pythagoras. These principals set a basic framework for behavior on the basis of experiential learning and weekly evaluation of the implementation of 12 virtues. The technique is practiced twice a day(before night sleep and in the morning before getting up from bed) and evolves into five successive steps;1)reading of the 12 virtues and diaphragmatic breathing, 2)recall every event og the day,3)third person visualization and self-observation, 4)self-dialogue "What have I done wrong?", "What have I done right?", "What have I omitted that I ought to have done?" Endorsement or disapproval of actions according to the 12 virtues and the instructions for a healthy lifestyle, 5) next morning brief revision of the previous night's conclusions and setting of goals for the upcoming day.

Stress in Children (SiC) Questionnaire: This is a self-report psychometric instrument that consists of 21 items measuring physical, emotional and symptomatic aspects of stress in children. Each question is answered using a 4-point Likert-type scale (1 = never, 4 = very often). We expect reduction.

State-trait anxiety in children (STAIC): This is a "how-I-feel" questionnaire consisting of two forms of 20 items each which was designed as a research tool for the study of anxiety in children aged 9 to 12 years old. Half of the questions ask children how they feel at a particular moment in time responding to the state-anxiety scale, and the other half set of questions address how they usually feel responding to the trait-anxiety scale. Each item is answered using a 3-point Likert scale ranging from 3=very often to 1=rarely.We expect reduction.