the resources from the Internet:
http://learnrussian.rt.com
http://masterrussian.com
http://www.russianlessons.net
http://www.alphadictionary.com/rusgrammar/
http://www.hello-world.com/Russian/index.php/
https://www.russianforfree.com/text-russian-bear.php
https://realrussianclub.com/slowrussianpodcast/
https://realrussianclub.com/tprs-russian-effortless-russian/
http://www.languageguide.org/russian/vocabulary/
Recommended reference works:
The Oxford Russian Dictionary (Russian-English, English-Russian OUP)
Russian Online Dictionary
The Russian Dictionary Tree (a learner grammatical dictionary)
free online bilingual dictionaries and tools