To remove dry erase marker from a whiteboard, you can try the following methods:

1. Use a dry erase board eraser: These are specifically designed to remove dry erase marker from whiteboards. Simply swipe the eraser over the markings and they should come off easily.
2. Use a clean cloth or paper towel: If you don’t have a dry erase board eraser, you can try using a clean cloth or paper towel to wipe off the markings. Moisten the cloth with water and gently wipe the markings until they disappear.
3. Use rubbing alcohol: Rubbing alcohol is a powerful cleaning agent that can help remove dry erase marker from a whiteboard. Dampen a cloth with rubbing alcohol and gently rub the markings until they disappear.
4. Use a whiteboard cleaner: These are specially formulated to remove dry erase marker from whiteboards. Simply spray the cleaner onto the markings and wipe them off with a clean cloth or paper towel.
5. Use baking soda and water: Mix a small amount of baking soda with water to create a paste. Apply the paste to the markings and let it sit for a few minutes. Then, use a clean cloth or sponge to scrub the paste into the markings and wipe them off.

If all else fails, you can try using a magic eraser. These are sponges that are coated with a special cleaning agent that can remove tough stains. Simply wet the magic eraser and scrub the markings until they disappear.