Interest plays a special role in developing a person's intellect, skills. It influences positively develops on thinking, memory, will power. The article analyses K. Izard's, W. James', D. Uznadze's statements regarding interest.

Experimental work on revealing pupils' interests in primary classes that we carried out is described. A classification of pupils' questions is given: the questions referring to the origins of things, constatation of facts; revealing the nature (character) of the thing, etc.

Those pedagogical conditions are underlined which benefit revealing and encouraging pupils' interests: purposefully organized talks, cooperative relations between pupils and teachers.