Labels and Laminating: Make your door a "delet"

As part of your classroom displays, include Hebrew labels for classroom objects - shulchan, sefer, aron, kiseh,ritzpa, luach, keer, tikra, chalon, delet, etc. Providing labels encourages students to learn a whole set of vocabulary informally, as they repeatedly see the label and hear objects called by their Hebrew names.
Even during Judaic Studies, students may be asked to;
Take a sefer from the aron.
Line up at the delet.
Put completed assignments on the shulchan.

If you are able to laminate the labels, so much the better. Laminating labels and other display materials makes the materials last practically forever. Laminated display items give a polished, professional look and easily survive being trampled or torn off the walls as your classroom is used for multiple purposes during the year. Plus, students think laminated stuff is cool, especially if it's their own creations that are laminated.

If your school or synagogue has a laminating machine that you're allowed to use - Lucky you! (As I've learned from experience, not all school or synagogue high-tech goodies may be available to teachers.)

Community Jewish Teacher Resource Centers, Bureaus of Jewish Education, and public school teacher centers might be sources for laminating services.

Copy/shipping stores, office supply stores, teacher's stores may also sell lamination.

If you can squeeze funds from your school's budget or put "laminating services" on a wish list - it's well worth it!