Clear plastic sheets for whiteboard?

i'm looking for some clear plastic sheets (similar to laminating) that i can use a dry erase markers on and place over the whiteboard in my classroom - for putting music notes on the staff etc.





i don't want to rewrite them over and over. since there is no laminator in my school, i am at a loss for what to use. of course i can by laminating rolls. anything else i can use and where to get it?Clear plastic sheets for whiteboard?
Would blank transparencies be the right size to use?Clear plastic sheets for whiteboard?
Use Plexiglas. You can buy it at a hardware store in various sizes and thicknesses. It is also cheap.
Draw them on thicker paper, and then buy contact paper (the sealing people put in cabinets). It is very inexpensive. Also, I have found, if you live by an university, it is fairly cheap to use their laminators.