The main objective of the research is to analyze the relationship between the duration and quality of sleep children / youth and their school performance. To this end, controls the effect of other variables that have been shown to produce significant effect on educational outcomes: the social condition of the family, the latter's interest in education, the relationship of the student with learning, the reaction of teachers face the difficulties of students and the profile of the class attended.
The methodology consists of applying a questionnaire to students in compulsory education (3rd to 9th grade) of a region of Lisbon. Sampling is intentional: are selected classes, diversifying the years of schooling and the social and academic profile of students of the same. Statistical analysis of the information will be held with the support of SPSS software.