Introduction. The implementation of educational programs in a modern school involves the formation of universal educational actions, including those actions that ensure the successful implementation of research activities, the so-called research skills in all categories of students. Unfortunately, there is currently an increasing trend in the number of children and adolescents with disabilities, which actualizes the problem of introducing inclusive education. The potential of mathematics as a school discipline can be used to form and evaluate the research skills of schoolchildren under conditions of inclusion. The purpose of the article is to present the experience of organizing a pilot experiment on the formation of research skills of ninth grade students in teaching mathematics under inclusion conditions and to analyze its results. Research methods. The analysis and generalization of scientific literature on the theory of problem-based learning, on the problems of mathematical training of children with disabilities and the use of interactive teaching methods are applied. Empirical methods were used: questioning of teachers and teachers of mathematics of educational organizations; observation; design of didactic tools to ensure the process of formation of research skills of all categories of students; pilot experiment and analysis of its results. The study involved the experimental ninth grade of school No. 55 in Novokuznetsk, in which there was a student with disorders of the musculoskeletal system (DMS). In the experiment, a binomial criterion was used to process the results. Results. The students of the experimental group were involved in the process of forming research skills, while the key feature of the methodology used is its reliance on a specially developed system of multi-level research open mathematical problems and differentiated educational research with the possibility of their implementation by means of a digital educational environment in online and offline format. A statistically significant positive dynamics of the development of research skills of ninth graders, including a student with disabilities, was revealed: Zem>Zcrit (2.46>1.64). Conclusion. The methodological techniques for the formation of research skills of schoolchildren in teaching mathematics under conditions of inclusion are summarized; the conclusion is made about improving the quality of mathematical education and promising areas for further research.