The support of technological resources in teaching and learning has contributed to make them more efficient and enjoyable. Through this support has become quite common to use media resources before explored only for entertainment for educational purposes, among them the TV. The interactive Digital TV (iDTV) provides resources that make possible the development of a plethora of educational applications. However, since TV is a mass distribution device, an aggravating factor in the use of this media for education is the presentation of contents (learning objects) inadequate according to both the users' previous knowledge and the subject of courses in which they are enrolled. This paper tries to fill this gap by proposing an educational environment for iDTV, supported by an adequate standard for classification of learning objects for t-learning, in order to deliver educational contents for iDTV, according to users' knowledge level and suitability of contents to ongoing course.