Goldstar Registry is a free service for teachers to use to get school supplies. The idea behind Goldstar Registry is the same as bridal registry services. Teachers visit the Goldstar website and register for classroom materials that they would like to receive. Then if a parent or grandparent asks if you would like anything for your classroom, you can have them look at your online registry.
Disclaimer: I do not have any affiliation with Goldstar. I just thought I would share this along because it seems like an interesting concept.