There are many ways to improve English skills, both inside or outside of a classroom. Traditionally classes with multiple students are a good way to focus on grammar and basic conversational skills. One-on-one private classes focus more specifically on improving advanced conversation and removing verbal tics or incorrect speech constructs and patterns.
Reading articles, books or news in English is the best way to improve vocabulary. Music and podcasts are two great ways to gain better listening skills. Finally, meeting with other English students for an “English night” at a bar or restaurant helps everyone to improve fluency.