Chris shows you how to make some large cheap white boards…
…the same material that they make most commercial whiteboards out of is available at most big-box lumber stores like Home Depot for less than $15. “Showerboard”, which is basically cheap plywood with a waterproof white plastic coating on one side. Its the same stuff that they make cheap showers out of – four walls of showerboard plus a cheap plastic base makes a decent stall. It also makes a great whiteboard.
How-To: Dirt Cheap Wall-Sized Whiteboards – Link.