Simply 2nd Resources had a post about her clip chart calendar to inform parents about the color the kiddos ended up on at the end of the day. I did something similar last year.
At the end of each day the kids would quickly color to show what their ending color was on the clip chart. Once the procedure was established it took very little time. The calendar went home on Fridays for parents to look over, sign, and comment on. Each month we'd add the new calendar but keep the previous. It was great to be able to look back over time and comment on improvements, etc. I even had kids counting the number of certain colors they had and setting goals for the next week/month. Loved it!
MayClip Chart Calendar With Dates
Sample of May Clip Chart Calendar