Abstract. Nowadays, there is a big discussion about two different topics: how distance learning and the old fashioned learning can be improved using the new technologies. In both cases, there are many collaborative tools based on the web infrastructure such as e-mail, web discussing groups, virtual campuses or audio and video conferences, that basically give a way of exchanging information among the different groups involved in learning tasks, but very few of them have been thought to help or to develop laboratory classes (labs). In this paper we describe a GRID infrastructure (ULabGrid) that supports distant laboratories for undergrad students.