Hi Rhonda,
You are going to encounter students with varying degrees of capabilities, but you must continue to teach. Those that are not reached needs to spend additional time with you, if time permits to get to a level of understanding. I have been teaching for over 23 years, and we get students that just do not get it on the first go round, and they need additional time. Perhaps, you can even find a peer tutor for the student.
Patricia Scales