As you can see he has his paper (which as been corrected by myself) and he is cross check it with another students. The "helping hat" students cannot give answers. They can show the students which items they have wrong, and then provide assistance in helping them think through the problem. Once a student has their paper checked by a helping hat and get their paper correct, then they can become a "helping hat" as well.
After a student gets their paper correct they may choose a stamp OR a sticker from my "stamp or sticker station." They will then use their paper to check other papers and eventually put their paper in their mailbox to take home. It is so nice not having papers pile up on my desk that I need to check. The students get instant feedback and can take it home the same day. It also allows parents to see what is happening in the classroom day by day. I highly recommend having this system in place in your classroom. The students really love it and it gives them a sense of pride (especially those at-risk students).
**I purchased the foam hats at the Dollar Tree. They were 4 for $1. I keep them in a basket labeled "helping hats."