Adaptive E-learning Systems:: Retrospection, opportunities and challenges

The topic of adaptation-pertinent systems was treated intensively by researchers before the era of computers, also in the field of teaching and learning. Further, E-Learning is a relatively young term, but since the beginning of computer sciences in the middle of the past century, many systems and theoretical solution approaches were developed to enable digital education. This paper aims at reviewing some interesting issues regarding this context in order to gain an insight into forgotten or ignored opportunities and challenges as well as underline the relevance and impact of old issues for present requirements.