The aim of our study is to investigate systems for supporting remote instruction via a mobile robot. In the real world, instructions are typically given through words and body orientations such as head movements, which make it possible to project others' actions. Projectability is an important resource in organizing multiple actions among multiple participants in co-ordination with one another. It can likewise be said that in the case of robot-human collaboration, it is necessary to design a robot's head so that a local participant can project the robot's (and remote person's) actions. GestureMan is a robot that is designed to support such projectability properties. It is argued that a remote controlled mobile robot, designed as a communication medium, makes relevant dual ecologies: ecology at a remote (robot operator's) site and at a local participant's (robot's) site. In order to design a robot as a viable communication medium, it is essential to c...