Preventing Whiteboard and Overhead Mistakes
A way to prevent accidentally using a permanent marker on a whiteboard or transparency is to create a tactile reminder. I wrap some masking tape around the permanent marker. If a mistake still occurs, the marker comes off with Goo-Gone or a similar product used to remove stickers and labels. Fantastic and hair spray also do the trick. With the proper markers, an easy way to clean used transparencies is to just run them under the faucet.