Here are a couple from my catalogue Teachers are:
+ 2 be
and just the simple: To teach is to touch a life forever.
But.... I found this really cool site online that has some great poems like this one...
For teaching children lessons,
to help them as they grow,
Let this gift remind you,
You're the best teacher we know!
and this one:
I chose this special present because I wanted you to know,
That I'm grateful for your hard work in helping me to grow.
For your constant understanding and for always being there,
To tell me I can do it and to show me that you care!
Here is the link: http://www.dltk-kids.com/school/poems_for_teachers.htm
Good luck with this fun project! Teachers gifts are my second most favorite thing to make!