Visual servoing uses the visual information provided by cameras to control the movement of a robotic system. This paper presents an international on-line course aimed at BSc, MSc and PhD students in this subject. The course lasted for eight weeks, and its objective was to provide a general vision of those aspects related to the course theme including a special incentive: the professors teaching the course were the most important experts in this field at a global level, signifying that the students were able to gain access to a potentially higher quality of teaching than that available at an individual traditional university.