Active listening is best! I always try to repeat the questions my students ask me. This serves two purposes: one, it makes sure that I understood what the student was trying to understand (and sometimes it clarifies this for the student as well!); two, if there are other people present who might need to hear the question it ensures that they are able to hear and understand what is being asked.
Sometimes simply re-phrasing the question can help the student realize where they are going wrong or make the topic simply click and then they don't need an answer. … >>>