**2.3. Knowledge object projection model**

The knowledge object framework is the same for different subject matter domains [10]. Knowledge object of "learning to read domain" are letters, words, sentences and texts; the micro-component of a knowledge object sentences are the components of words (letters). It would be necessary to characterize the differences between knowledge object as entity and its proprieties, for example: The knowledge objects sentences have two types of knowledge (**Figure 4**):

