Daniel,
The first thing to remember is that you aren't expected to know everything about every topic at all times. Given how busy we are these days, it's nearly impossible to always have an answer on the tip of your tongue. If the question is related to something you're working on or should be familiar with, you likely do know something -- and that something is worth contributing. So instead of just going straight to, "I don't know, sorry," take a second to collect your thoughts and provide the student with the fact or tidbit you do know. If you… >>>