relationship is against his intentions which are based on numerous tutoring experiences and a reasoned and militant approach to the teaching profession. Cédric finds himself split between his pleasure in taking part in teacher training and his desire to promote the fruit of his reflections on volleyball. The initial knowledge to be transmitted becomes singularised knowledge when it is actually taught. This notion introduces the subjective dimension that prevails over the reorganisation of knowledge when it is brought into discussion during an advisory meeting.