Reading my comment again I explained rather poorly. I was thinking each user would have an income of 1 help token a day, which they could then use as a reward to those who help them, and the helper could then use the points they earned as a bounty to encourage others to help them in turn. Maybe something between Yahoo Answers and Steem?

Hopefully if the tokens had a somewhat stable value, it would be somewhat difficult to convince people to give you the token versus being able to generate them easily.

So say those dozen freshman have 100 tokens saved up, and give you 5 a day for a week of tutoring, you wind up with 420 and can then reward someone later for a somewhat proportional amount of help. But if I just pool my tokens together with someone else, we only generate 14 tokens over the week.