(Abstract: Theoretical orientation and practice for the didactic use of Internet, through Didactic Units and telematic experiences, with activities that assist to the diversity from a focus of colaboration. Contemplate the motivation and desmotivation of the pupil before the technology and the author offers a wide information on on-line didactic materials for the curricular development of the subject. It allows the combined work among parts different from the Mathematical one and with other curricular areas, to contribute the unitary vision of the knowledge. La carpeta incluye un CD).