Where data is not available, simple and well-tried assessment tools should be used to
identify relevant conditions and behaviours. For instance, food frequency questionnaires
can assist students and others to estimate how frequently certain foods are usually
consumed (7). This information can then be compared with established guidelines. To
reduce unnecessary repetitions of such assessments in schools, the collection of nutritionrelated
knowledge, behaviours and conditions may be most efficiently done as part of a
broad survey of health-related behaviours and conditions. Information about values,
beliefs and attitudes can be obtained from students and parents through interviews,
informal discussions or questionnaires, as listed in Annex 2.