Changes in educational technologies modify the role of the teacher and require new competencies. Scientific literature describes competence in using ICT as the wholeness of two structural components - basic and educational ICT competence. The conception has been considered conducting research on would-be teachers' competence in applying ICT. The article deals with the exposition of would-be teachers' competence in applying ICT in the process of teaching practice and focuses on the impact of studying informatics in forms 11 and 12 on the development of the latter competence. Research disclosed that would-be teachers had fully mastered ordinary abilities demonstrating basic and educational competencies in ICT. The development of would-be teachers' competence has been accepted as a permanent process starting yet before the studies at university within the process of learning informatics in forms 11 and 12.