This paper describes the user interface of an Intelligent Tutoring System that enables the customization of e-Learning systems according to the needs of students requiring recommendation along pedagogical pathways. The interface has been implemented for the Moodle e-learning platform by using a standard extension mechanism provided by this Learning Management System (LMS) referred as "block". The designed interface allows the intelligent system to interact with the LMS and the learner, whose learning is continuously monitored and supported by means of personalized recommendations and messages. The system usability has been evaluated in the context of a course about Computer Network Design. Results show that the designed interface is well integrated into Moodle and generates a non-intrusive user interface.