Assignment / Homework Punch Card Creation

Working on home schooling stuff over the Christmas break.  Hopefully this will help keep them motivated.  They can punch out with a hole punch on each of the circles when they finish a subject.  I will add some incentive, such as when they complete 10 cards they get a surprise or activity?  I haven't decided yet.  I plan on using it for homework with Doug who is going to high school away from home.  I am going to print this out on card stock and cut them apart.  I also might get a jar and have them put in the cards when they are completed and each Friday draw a card for an incentive.  The possibilities are endless.