The necessity of training of future informatics teachers to use computer visualisation tools was proven by us in previous scientific works. This research allowed us to construct a model of training of future teachers to use computer visualisation tools (CVT) in their professional activities. This model involved the using of innovative methods and learning tools. At the same time, this model required experimental verification of its effectiveness. The model's result envisaged for the formation of readiness of future informatics teachers to use CVT. The purpose of this article is to present the results of a pedagogical experiment to test the effectiveness of the model for preparing future informatics teachers to use CVT in their professional activities, taking into account the selected indicators. The tasks of the pedagogical experiment are described. Among them: an analysis of the readiness of future computer science teachers to use CVT; development, implementation and verification of the effectiveness of the model for the preparation of future computer science teachers for the use of CVT in professional activities; development of the content and structure of the special course that will be used in the professional training of future computer science teachers; processing, analysis and interpretation of the quantitative data obtained. Their implementation was assumed during the three stages of the pedagogical experiment (ascertaining - 2016, clarifying - 2017 forming - 2018). In our research, were used theoretical methods: consideration of scientific literary sources (scientific articles, reports of speeches at conferences, dissertations of candidates and doctors of science, methodological guidelines, guidelines, books); and empirical: questioning, conversation, interview, testing. A selection of techniques for checking the formation of the readiness components is described. In addition, statistics on the dynamics of their formation in the form of diagrams are reflected. The statistical analysis of the results showed that the modernisation of training of future informatics teachers positively influenced the formation of them readiness to the use CVT in professional activities. The research hypothesis about effectiveness of the specifically training was confirmed at the significance level of 0.05.