The revolution of Computer Assisted Instruction (CAI) began in 1976 with the introduction of the new generation of machines in education, microcomputers. Continuous technological changes have brought a notable evolution in CAI until our days. Intelligent Tutor Systems try to provide the data processing environment with the elements that a professor has at hand to
perform his work, considering him an expert where knowledge interacts over domain as an adequate pedagogical strategy and a model focused on the student.
Using computers in teaching is very useful, even more with the development of Artificial Intelligence, the use of new data and communication technologies that give it flexibility, personalization, inter-activity and quality in the applications.