I was in classroom at Payap the other day studying with my classmates. We were using the whiteboard together. One of my classmates picks up a permanent marker and starts to write on the white board. I quickly stopped them and reached for the eraser to try to remove their mistake. It didn't work.

One of my other classmates quickly used one of the erasable markers to trace over the permanent marker and then used the eraser to remove the mistake.

I was amazed it worked! I'm sure others know about this but in case you don't.....now you do.

I will close this topic as we have the same discussion running here:

Thanks for the suggestion. I have posted the OP's comment in that thread.