*2.3. Food Frequency Questionnaire*

Food frequency questionnaires were used to collect dietary information from the school catering managers or cooks about the school menus and meals that were provided to students in the high schools. This information was based on the types of foods and meals offered to the students on both a daily and a weekly basis, the frequency of food provision, and the portion size of meals offered to students, all based on the school menus. This was necessary to establish the types of meals offered in the high schools, and the meal frequency and portion sizes served to students to provide nutrients in comparison to the WHO's 2006 guidelines for RDA.
