
Originally Posted by
Piscean
You are very concerned about 'bothering' the learners, but they show no concern for you. If you are not able to teach effectively because of these students, then they are not learning. That should be more worrying than breaking a rapport that you don't actually have.
You will have to make it clear to them that if they wish to say something to you or ask you a question, they must make some acceptable sign (such as raising a hand). Think of some form of sanction (such as the withdrawal of some privilege) for learners who disrupt your lesson.