Simulation in teaching is a teaching method based on real situations through teaching equipment. Simulation techniques are used in teaching many different fields, including information technology. In this article, we study the use of simulation techniques to improve the quality of IT teaching. Simulation techniques can be used in teaching operating systems and computer networks, teaching computer hardware, teaching programming, teaching network security.Simulation in teaching is a teaching method based on real situations through teaching equipment. Simulation techniques are used in teaching many different fields, including information technology. In this article, we study the use of simulation techniques to improve the quality of IT teaching. Simulation techniques can be used in teaching operating systems and computer networks, teaching computer hardware, teaching programming, teaching network security.