A word about gifted children "tutoring" other children in the classroom:
My child's classroom does this, and I think it can work if both the tutor and recipient initiate the arrangement. In this case, the children are paired by the teacher. My dd told me that most of the time, the other child she is paired with just asks her for "the answer" to the problem. She decided the way to handle this was to tell them (loud enough for the teacher to hear) "I'm not going to give you the answer--figure it out! You can do it."
The problem is, she can't tell the other child how she figures out the answer--she just "knows." I had the same problem with a TA trying to teach Calculus--he had never struggled with it, so he couldn't tell us clueless students how to work through the process.
If the kids come up with it on their own, fine. Otherwise, it is frustrating for both the tutor and the "tutee."
