Figure 1 The user interface of a web-based adaptive e-learning application model is chosen because this model is specially designed for the engineering context [17], [18] and very often used in research related to technology-enhanced learning [19]. This model describes the learning style in more detail, distinguishing the learner preferences into four dimensions (active-reflective, sensing-intuitive, visual-verbal, and sequential-global) [20]. Theoretically, these four dimensions possibly generate 16 (or 2*) different learning styles. In order to collect the learning style information with regard to this model, the Index of Learning Styles (ILS) questionnaire, which consists of 44 multiple-choice items [21], is implemented in this e-learning system. The sec- ond aspect of adaptation is information concerning the student’s initial knowledge. The pre-knowledge of each student is gathered through a pre-test. This pre-test is constructed in a multiple-choice form that corresponds to a specific subject.