In this paper, new educational software developed for Design of Steel Structures lesson is presented. The software is named as STR2 and developed by using MATLAB which is a mathematical tool. All design steps can be monitored by using the software. To analyze the structure, the user do not assign loads to joints and elements, self-load of system, snow load and wind load are assigned to system automatically. Finite Element Method is used for structural analysis. The structural system can be designed according to TS648.