M V Grosheva* (grosheva@inmech.msu.ru), V A Samsonov (Russia) A Certain Educational Course in Mechanics with Computer Algebra System This work is example of program system for computer application in one mechanical problem education. It is educational course : "Introduction to the theory of a body motion in the resistant media". This course is intended for study of the properties of dynamical models of a body motion under the media influence. The search for the essential effects in a body behavior - auto-oscillations, bifurcation, catastrophes, stochastic motion - are fulfilled. The course include: the text of lectures and the program library for the computation and visualization of the body motion trajectories. In the lectures the simplified problems which permit analytical solution are discussed. For the study of more complicated problems the computer programs can be used by the lector and the students. This software can be also used for research studies in aerospace industry. We're using C, Maple, Matlab.