Google have an excellent online translator to help speakers of English as a second language to quickly understand or write and to double check that they have got it right.
For more advanced English speakers, using a dictionary helps to make sure that you continue to learn English while using English. Immersion is important because speaking and reading comes more naturally that way.
Practice makes perfect! Make sure that you're working on your English between classes. If you can't make conversational classes, reading is the next best thing.