This can be used as a reward system to get students motivated to do all of their homework. Once a student has completed their homework each day of that month, they earn that months badge.
It is up to you as to how you display these homework badges. They can have a chart on their locker/cubby that holds the badges, or you can clip them on a necklace like brag tags.
Simply print them on cardstock for durability, or print on full-sheet sticker paper before cutting into separate badges.
I also have badges for reading, writing, spelling, and attendance.