 The Program SI! is a multilevel school-based intervention integrating four cardiovascular health-related components diet, physical activity, human body and emotions management. Since the Program SI! for preschoolers has shown good results in improving healthy lifestyle habits in children aged 3 to 5 years, the investigators have developed the Program SI! for Elementary addressed to children from 6 to 11 years. The objective of the study is to evaluate the effects of Program SI! for Elementary in different times of exposure for childrens and their immediate environment teachers, parents and school. In the Community of Madrid-South Area Spain, 48 public schools from were randomly assigned to Program SI! for Elementary during 3 or 6 academic years intervention group or keep their normal curriculum control group. The main outcome is 3-year, and 6-year changes from baseline of questionnaire scoring of children, and the secondary outcome is 3-year, and 6-year changes from baseline of questionnaire scoring of their parents and teachers in regards to a healthy lifestyle, as well as changes in the school environment. For children were included 3-year, and 6-year changes of cardiovascular markers derived from blood pressure and anthropometry weight, height, waist circumference and skinfold thickness. The Program SI! for Elementary is designed for different exposures in a sample of schools never intervened to asses when the intervention has the most effectiveness. Besides, as some schools involved in the preschool study continues the Program SI! for Elementary, the investigators can be able to evaluate the impact of the Program SI! in different school stages, concluding how children keep the adoption of healthy behaviors from early in life. 