I found this on another thread:
Forums at Splitcoaststampers
I think you could word it a little differently for your occasion or at least get an idea:
Green is for the inspiration you gave to me each day,
Blue is for your patience in showing me the way,
Orange is for your warmth and your caring style,
Yellow is for the way you could always make me smile,
Red is for my life that you touched this year,
You’re a very special teacher, like this jar-that’s clear!