Aims : To present at the lung function workstations techniques targeting school age children (whenever the specificities or caveats due to young age (preschoolers), information adapted to young children will be dispensed); to present static lung volume, respiratory mechanics (resistance, plethysmography, maximal mouth pressure), spirometry, multiple breath washout and carbon monoxide diffusion techniques; to describe the physiology useful to explain the technical aspects of the measures; to identify the criteria for quality acceptability thanks to the inspection of traces of the different measures; to complete the interpretation of different lung function tests using updated reference values, with a clinical perspective thanks to short clinical cases submitted to small groups then discussed with the all group; to list the indications of polysomnography and of other methods used to diagnose sleep disordered breathing; to describe the techniques used to record sleep variables; to explain the rules to score sleep stages and respiratory events in children of different age groups with polysomnography fragments to interpret in small groups; to complete the interpretation of the results according to the normal values for different age groups, thanks to short clinical cases.