Missing work - FREE printable. Have the student who does not have their homework take a half sheet on a piece of colored paper and turn that in instead of their assignment and then when they bring the assignment in they can attach the paper to it. Late assignments are only accepted with the half sheet attached. Solves 2 problems, you are not constantly trying to figure out who is missing what and it forces the students to take responsibility for late work.
Whole class homework incentive - Pin the letters face down onto a board. When the whole class brings in their completed homework, turn a letter around. Once the word homework can be fully seen as a class vote on a reward. Freebies