Dry erase markers work on desks, doors (made of shiny particle board), and even mirrors! A funny video explores why dry erase markers leave behind marks when used. The narrator explains what the markers are made of, specifically the pigments and their polymer make-up, and then discusses how they must be used on a nonporous surface—and even then, they leave trace amounts of pigment behind.
- Have classes experiment with different types of whiteboards to see which ones leave the least amount of residue
- Experiment with different cleaners to see which ones remove the ghost marker the best and then have classes explain how the marker is removed
- Turn on closed captioning so all learners can follow along, because the speed at which the narrator speaks is quite fast
- Video can be viewed in many different languages when auto-translate is turned on in the settings
- Super intriguing topic that may interest teachers more than the pupils because every teacher who uses whiteboards has been frustrated by the ghosts left behind