This reference work for Russian grammar is a more valuable book to hang on to than a textbook on Russian would be. It breaks the complex Russian grammatical system down into neatly-indexed sections, which can be quickly used in preparation for tests, as an assist for homework, or as a memory-jog in preparation for regular use of the language. This version is written for native English-speakers with some grasp of Russian, although a creative teacher could probably build a syllabus using it instead of a standard textbook, since all levels of Russian, including an intro to the cyrillic alphabet. It is not designed to be a pedagogical tool, so much as a grammar reference, however, so this would require more work on the part of the instructor.