SUMMARY
Context. The problem in substantiation for methods on constructing models of trainer and trainees, taking into account thepeculiarities of their information activity, is considered. The object for the study were the models of trainer and trainees asparticipants in information interaction.Objective. The goal for the work is the solving of the tasks in conceptualization and formalization, aimed at modeling thetrainer’s subsystem in the framework of information technology for instruction, as well as modeling information flows andinformation procedures in the model of the trainee’s subsystem.Method. The key components of learning systems and processes are the trainer and trainees. The essential features ofinformation interaction between the instructor and trainees are highlighted. The basis is the concept of the information flow, thespecific properties of information flows that are characteristic of learning processes and important for their successful progress areidentified. Methods for modeling the key components of the training system as an information system are proposed, such as: thetrainer`s subsystem, considered from the point of view of the application for learning information technologies; a subsystem of thetrainee, represented from the perspective of the use for information flows and information procedures.Results. The proposed models were implemented programmatically and studied practically in the learning processes as a resultof working out the modeling tasks for the trainer and trainees as participants in information interaction.Conclusions. The conducted experiment confirmed the effectiveness and validity of the concepts and formalisms, theappropriateness for their implementation in information systems, processes and technologies of teaching with the purpose ofincreasing the processes efficiency on obtaining and practical implementation of information activity models for the trainer andtrainees. Further development of research implies the consideration for a wider range of the information activity aspects on theeducator and trainees, as well as the corresponding experimental approbations.