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The need for utilization of a user state model in distance learning systems (DLS) was substantiated. To develop this model, all the DNS teaching material is divided into the sets of elementary indivisible data of specific type, e.g., definitions, explanations, formulas, schemes, theorems, descriptions, etc. A set of data to be mastered by a specific user is formed. With this done, in every subject, the following three types of sets are considered as user states: a set of all learned and checked data, a set of all learned and not yet checked data, and a set of all the marks obtained for tests. Moreover, the system deals with sets of elementary data being checked by specific standard tests and with a set of user's standard actions enabling him/her to change his/her user's state for another one. Based on these values, a graph model for the states of DLS user is formed to match to his learning process. [ABSTRACT FROM AUTHOR]