Please do not do that.
When I was in school, I had several instructors devise schemes where students were incentivized to keep each-other in line.
The general idea was that if at least one student stole from a cookie jar, then all students in the class would be punished. Thus, the students would pressure each-other to not steal cookies.
The reality is that a student does not recognize the authority of another student.
Also, students have no incentive to allow other students to push them around.
Suppose that someone named Sarah and I are both students.
The teacher has decided that if Sarah does not do her homework, then I will receive a failing grade too!
Problem, there is nothing I can do to incentivize Sarah to work.
Sarah has decided she is not going to do the homework.
Sarah does not care about her grade.
If Sarah does not care about her own grade, then she really does not care about my grade.
Students who cheat on exams and/or don't do their share of the work on a group project tend to be selfish. That is, they care about their own grade, more than other people's grades (relatively speaking).
If Sarah is willing to get an F as her own grade, then she really does not care if I get an F on the assignment.
What on earth could I do to persuade Sarah to do her homework? The teacher has decided that I will get an F if Sarah does not turn in her homework?
About the worst I could do is yell at her; in which case, she would simply yell back.
Most students are not made of money. They cannot pay the other student $100 to do their homework.
Schemes in which teachers reward/punish student A based on student B's behavior always result in the same thing: students lie about their peers performance in order to save their own a$$.
For example, when I was in college, I took a course in software engineering. There was a group project. Our group was supposed to pretend that we were government contractors. For example, maybe the government wanted us to design and build a new cafeteria for soldiers, the project management plan states all kinds of things, like:
- how much money building the new cafeteria will require
- how much time building the new cafeteria will require
- how many soldiers can sit in the cafeteria simultaneously (maybe their is seating for 200 soldiers)
- a requirement that vegan options must be available
- expected throughput (soldiers served per minute)
- amount of refrigerator space required
- number of kitchen knives required. Initial number + number of new knives per year.
- amount of concrete required, amount of lumber required, etc...
- estimated air-conditioning bill for the cafeteria in the summertime.
- estimated heating costs for the cafeteria in the wintertime.
Okay... so the project management plan was long document we had to turn in. One Chinese girl did nothing until less than 3 days before the due date. Our group had months, almost the entire semester, to work on the project.
I gave her a list of industry vocabulary words and asked if she could google each industry term and add a dictionary of terms to the project management plan. She did make one (sort of). I included definitions of the first 2 or 3 industry terms I sent to her. I did this to make it easy (reminiscent of seeing something like "the first row of the table is done for you. Please complete the rest of the table"). Her dictionary of specialized terms was less than 2 pages long when complete. She failed to conceive of any vocabulary words beyond those I had thought of off the top of my head and sent to her.
My college professor told us that each group in the class would be failed for this project if there was someone who did not do their fair share of the work. As such, we all decided Ms. do-nothing "was a very helpful person, and we were glad to have her on our team."
When you punish student A* for student B's negligence, then student A suddenly has an incentive to "carry" student B.
As such, the amount cheating done by students goes up.
Normally, I have no incentive to do Sarah's homework for her. However, if my teacher tells me that I will receive an F if Sarah does badly on the homework, then I end up doing Sarah's homework. It's not difficult for me to solve the same problem many different ways. I can easily make "her" work look radically different than mine. My forgeries are undetectable.
Suppose I take the high road and refuse to do Sarah's work for her.
If Sarah is not inclined to do anything, then how would I persuade her work?
There is nothing I am allowed to do. I am given no leverage.
- I can't tweak her grades.
- I can't pay her money.
- I am not going to creepily follow her home at night while carrying in a baseball bat in a menacing way.
Students have no power over other students. I have no capacity to reward or punish her.
Suppose the government told me that I would go to prison if my neighbor cheated on their income taxes. Well... What authority do I have over my neighbor? Does the government let me impose fines? No. Does the government let me create tax incentives? No.
Am I allowed to arrest a person, like a police officer? No.
The only thing I really could do is do my neighbor's taxes for them.
Student A has nothing they can use to reward or punish student B if student B does not want to do their homework.
If student A's grades are based on student B's performance, then student B will usually fudge the results rather than go down with the sinking ship.