To understand EducationalTechnology you need to understand its role in support of the teaching-learning process. To understand the teaching-learning process, you need to understand teaching. To understand teaching, you need to understand communication and the communicating participants. To understand the participants you need to understand the learner and to understand the learner, you need to understand learning theory and the facts affecting individual learning (Lever-Duffy, M''''''cDonald, Mizell, 2005).