The article is devoted the modeling a semantic knowledge network. The knowledge network is the basic concept of knowledge management - a new discipline that implements the principles of sustainable development of education. The method of constructing a semantic knowledge network allowed us to analyze the connections between concepts of the educational disciplines: “Economic Cybernetics”, “Algorithmization and Programming” and "Mathematical Analysis". The paper compares the topological characteristics of the concept graphs. We described algorithm to implement the subject area model in the form of a semantic knowledge network. Further, 125 concepts are analyzed that are necessary for the assimilation of each of the disciplines and the connection between the concepts (communication means the need to master one concept of another).