I am in an accelerated Master's program in Engineering, we are taking a Probability course. At this time the class is review for me (I have a B.S. in Mathematics), we are moving very fast though.
One of the other students asked if I would be willing to tutor them, and offered to pay me for the time.
My main worries are that 1. I will get to a point where I am trying to summarize information I have just learned, 2. That I will have a good mathematical explanation but miss the point in plain English, and 3. that tutoring will cause me to not have enough time to study myself.
With those misgivings in mind, would it be more ethical/reasonable to just give some advice for free or to set up payment plan? I am not just going to say "No, I won't help" but if I was charging I would want to be able to give their money's worth.