I think it's interesting that it is coming from the principals perspective. This sheds a lot of light on what is important to her- clearly the teachers self esteem, but also that she is proud of what she is helping to foster here at school each day. If this board had come from me/ the school counselor, I think it would mean something different to the teachers. When it comes from the princiapl- AKA THE BOSS- it shows that she is taking the time to care.
I hope you can easily implement this board at your school- it takes a few minutes to make, and has helped spread the positive vibes that every school needs.
You're never too old for a self esteem booster,
Your Floridian chick