The paper is devoted to the study of systematicity of students’ learning activity as a parameter of student’s model, and influence of systematicity at learning result in course “Operating systems”. The necessity to equip the student himself as the subject of the educational process with the skills and appropriate pedagogical forecasting tools for independent choice of the appropriate variant of educational activity is shown as theoretical framework. Parameters of models in such pedagogical diagnostics system are suggested and discussed. Empirical work has been realised on the base of learning management system Moodle and give possibility to analyse correlation between timeliness of completing the learning tasks by students and their educational achievements as well as to analyse the structure of students’ time planning at homework. Recommendations to improve the educational process have been suggested