Study out loud! Mimic the sounds of the language. Don't mumble. Although most people feel embarrassed making strange sounds, the language will soon feel more familiar to you.
When called on in class, say something, even it it's wrong: you'll learn from it. If you need a moment to think, repeat the question. If you don't know the answer, say in your foreign language, "I don't know" or "help!"
Practice with a foreign student who wants your help to learn English or with another class member.