ABSTRACT : This paper presents a comparative study of cognitive mediations between pedagogical devices dedicated to introduced robotic/ computer science to last section of kindergarten learners. The ludo-pedagogical session “Blue Bot” used for the experimentations was declined in three modalities: the body, the robot and digital tablets. This study highlights how mediator instruments influence acts of teaching through the identification of professional gestures, postures and conceptions.
KEYWORDS : Educational robotics, cognitive mediation, activity analysis, last section of kindergarten, teacher acts, professional gestures and postures.