Adaptive E-learning is advisable for students with unique profiles, specific interests, and from various areas of knowledge, so that profiles may be able to contemplate particular aims of the students, altogether with various preferences, knowledge level, learning style, rendering psychological profile, etc. Self-directed learning also needs to be taken into consideration. Self-directed learning, unlike adaptive E-learning, is linked with autonomy in learning; it is a reasonable link for readiness for E-learning, where students direct their own classes as per their own requirements. This book informs us about the On-Job Training and Interactive Teaching for E-learning, talking about the inspirations to be contemplated for E-learning. It also engages with the problems faced in E-learning in fields like engineering, medical education and biological studies; different approaches to E-learning; as well as the implementations of E-learning environments.