Experimental work is an integral part of scientific and pedagogical research and is the main criterion for confirming the reliability, practical significance and applicability of the results of any research in this field. Teacher-researchers and practicing teachers strive to improve their pedagogical and methodological status, find confirmation of applied pedagogical innovations, and qualitatively change education from experimental work devoted to solving specific educational problems. Therefore, there may be different reasons and motivations for researchers and teaching practitioners in organizing and participating in experimental work, but there is only one condition, according to which each performer who decides to contribute to this process must be a master of his profession, it is necessary to use all of it professional skills.