[alawton]

I guess moving around the room is not possible for your class. In similar situations I've used the game "telephone" to have students practice pronunciation. The first person in the row is presented with a sentence that includes target vocabulary or grammar. You (the teacher)come up with the sentences. That first student reads the sentence and whispers it to the next perosn. The sentences is passed down the row like this and the last person stands up and tells the class what he heard. Depending on your students, it can be way off or correct. I've always had fun with this one. Try it!