Abstract : This work analyses the sprint for the primary school children and elaborates, for teachers, a teaching aid to analyse the sprint. The first part has allowed to isolate some physical levels in sprint apart from the age of the children. For this, two hundred and seventy children between two and eleven years old have been filmed and their sprint analysed thanks to the 3D vision software by Gilles Dietrich. Each sprint has been identified by indicators (time, space and time and angle) and by measures taken on a parametric representation of the toes positions. The fixed point being the ear("poulaine d'oreille"). A hierarchical selection has allowed to define six, then five, physical levels in the children sprint. Each level has been described, the main characteristics isolated by an analysis in the main component. A first shape of the different levels is proposed as an average "poulaine". A cd-rom to learn the movement analysis has been created and tested by some students. The results have made clear the difficulty of comprehension of the "poulaine". They led to a new shape, more representative of the sprint level by a "sight". This shape takes into account the trunk tilt, the position of the ankle and the position of the thigh. They are also the basis of the changes in the conceptio of the instrument. The second cd-rom has been tested by trainee teachers and led to a better analysis of the pupil's sprint.