This poster was up in the hallway of one of the schools I go to. I thought it was pretty cool. Student's get to sign their name in one of the numbers once they have mastered that specific fact. The banner is in the younger hallways as well with 1-10.
The poster was made using one of the school's colored poster maker (Staples might be able to make it as well if you don't have a poster maker).
Here is the link to the adobe files of the numbers (1-12 and 1-10).