The author describes the new system of instruction - the closed cycle instruction system. The lesson in the system consists mostly of the following instructional events: creation of problem, objectives presentation, creation of thesaurus, approaching and mastering the first learning dose, individual study, approaching and mastering the second learning dose, individual study, achievement test solving, pre-reinforcement discussion, correct answers announcement, lesson evaluation. The author presents the results of the research of the closed cycle instruction system effectiveness in comparison with the traditional instruction. The closed cycle instruction system proved to be more effective in the area of instruction humanisation.