The word “training” is used not only in such contexts as “teacher training” but also in other contexts such as “training of doctors and engineers” on the one hand and “training of semi-skilled craftmen” on the other. In many of these situations there is a period of training, very often in special institutions. A person completing a period of training successfully is believed to be capable of operating at higher levels of the cognitive, psychomotor and affective domains with an enhanced store of knowledge.