The skills used in oral reading are different from those used when reading silently. Use oral reading sparingly to work on verbal presentation (pronunciation, intonation) and be sure to allow time for silent reading. It's best to set a time limit so the learners know just how much time they have, and you can flex it if your estimate is off. When they read silently, learners will be able to absorb meaning and look at English usage much more fully than when they read aloud. They will also be able to tackle longer passages.