I put a tag inside the pencil cases that says: "It takes a big heart to help shaping little minds" and the name of my daughter, so they can remember who gave them.
PS.: I'm really enjoying sewing bags and wallets! :-)
UPDATE: After giving the presents for my daughter's teachers, my teacher told me the correct sentence is: "It takes a big heart to help shape little minds":-( I wish she had corrected me before... :-))) Well, I corrected the pdf, so you can use it next year.