I completely second ajc2855's advice... I typically do not have the student mirror my words, but I have a class with a heavy ELL population, and slowing down and having them mirror my words and gestures has really improved the whole process. They are now getting to the point (3 weeks in to school), where they are doing some paraphrasing and more critical thinking, not rely so much on my exact wording!
I have a newcomer student who understands very little and speaks even less... but she particpates and repeats what I am saying - yesterday she finally answered a question and then broke out in a terrible case of the giggles when everyone gave her a 10 finger woo!!