A major problem in teaching and learning control theory is acquiring unconventional systems thinking. However, using discrete-time models does not require infinitesimal mathematics, so building on the knowledge acquired at the high school level is possible. This paper aims to show how different discrete-time models (discrete-time convolution, autoregressive moving average model) can be used to illustrate the basic principles of control engineering and describe dynamic systems. With these and similar methods, the focus is shifted to understanding mechatronic engineering, thus increasing the effectiveness of the teaching.