Process of teaching is considered as interaction of complicated intellectual systems. Properties of classical classroom teaching and computer-based teaching (E-Teaching) are compared in respect of interrelated systems involved to teaching/learning process. It is shown that on the base of adoptive character of classical classroom teaching lies “slow” and “quick” feedbacks between teacher from one side and groups of learners and individual learners from other side. These feedbacks are not inherent to eLearning and E-Teaching. Viewpoints of paper’s authors regarding problems of eLearning/E-Teaching and possible ways of these problems eliminating are presented. Experience of paper’s authors in application of E-Teaching directed to different types of distributed learners groups, namely, young people with special needs, teachers of Informatics from rural secondary schools and representatives of rural municipal offices, is described.