The presented software can be used in a class environment by means of the tech- nological training materials (projection, intelligent blackboard, etc.) and many practices can be made. It may be made more useful and educational with mutual interactions of students on a local network. With a network installed in a computer laboratory, many useful applications can be realized: for example students can use the program simultaneously, unclear points can be learned with the question-an- swer method and each student can study on problems he/she has designed. As the size of files being modeled in the program is extremely small, they can be transmit- ted to other users via the Internet remarkably easily. With this method, instructors