I want other moms opinions on this please. Today I found out from my sons school who is in 4th grade…

I want other moms opinions on this please. Today I found out from my sons school who is in 4th grade that him and his classmates were using a program that is homework related to cheat for other classmates to make their scores be really high. Not only will he be in trouble at school but home as well. My question is what would an appropriate punishment be for him. I usually take away all gaming systems, tv and so on. And please keep in mind he has regular chores he does as well