The aim of this thesis was to investigate how children apprehend health and what factors teachers ascribed have the most importance for 10-12 years old children’s health. By these two questions at issue in our thesis we hope to support teachers’ education of health and suggest where they should put their main focus. What does health mean to children in an elementary school in the Philippines? What factors do teachers ascribe as the most important for children’s health?   To reach our aim we interviewed twelve children and did a questionnaire among 20 teachers. Our study is based on Bronfenbrenner’s theoretical perspective, both as our theoretical basis and as our methodical analysis structure. The result and analysis showed that health is defined differently among the children. Definitions that the children’s statements put most frequent focus on were happiness, the body condition and believes. The most important factors, ascribed by the teachers, are found in Bronfenbrenner’s micro- and mesosystem and are “good personal hygiene”, “eating healthy food” and to have “a good relationship between the home and the school”. The result also shows that the exosystem have the least important summary of all mean values but the individual factor the teachers ascribe as the least important is “the government ideology” in the macrosystem.