Chalk it up!
I have put a chalkboard in each of my boys' rooms.
One is framed, one is unframed. 10"x13"
Each day I will put 6 or 7 chores on the board for the day.
Next to each chore is a box.
When the chore is complete they will put a check in the box.
If all the boxes are checked off at the end of the day, they will receive a star in their individual pocket planner (month at a glance works well).
If they receive a star for the day, the next day, they get video game time. I figure it this way, if they've done all of their chores they deserve to have some mindless time. I may have to throw in some monetary incentive too:)
The nine year old is on board. As for the thirteen year old, we'll have to see how it works.
I'll keep you updated to see how it's working.
Here's a link to my Chalk it up! store if you'd like some chalkboards of your own.