Russian for your particular purpose. You might be a student studying Russian, or someone who need a translation or consultation just once. Contact me for getting the following:

Regular and full explanations and answers on all your questions concerning the usage of Russian words and structures;
English-Russian translations;
Help with tasks, tests, etc.
Information (articles, different kinds of data) from Russian magazines, newspapers, RuNet.
Answers on questions about Russia.
Help with making a speech/presentation in Russian.

Simple explanation, MORE real EXAMPLES than grammatical terms. Serious and responsible attitude. Native speaker.