This paper presents a computer-tool teaching system supplied by a language processor. Its aim is to correct mistakes in texts written by foreign students learning Russian as a second language. Since a text may include grammar mistakes, the system cannot use morphological analysis to foolextent. So one must compile a programm capable of finding and correcting mistakes without traditional means of analysis.To solve this problem we propone a system that includes a vocabulary and rules of finding and re-writing words. So the process consists of finding word stems and than correcting word endings . Semantic and syntactic information("a model of ru-ling"/Mel'cuk 1974/9 necessary for that is written in the vocabulary of verbs as a frame. The slots of this frame contain semantic and morphological information about words that depend on this word.The vocabulary containing now approximately 200 lexemes is enough for beginners.
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