I have put my TOG in page protectors and am also using them for the overlays for geography. We are using Sharpies to write on them, and I have read that it comes off with a cotton ball and a little rubbing alcohol.
We just discovered by accident that you can just erase it with a regular pencil eraser. I haven't tried this on any writing that is more than a coule of days old, but it has been so much easier than using alcohol. If the kids make a mistake on their overlay they can just erase it and fix it with no trouble at all.
This may not be news to those of you who have been doing this a while, but it sure made life simpler when we figured it out!
Holly

Thanks, Holly! This will be a huge time and money saver!!

Holly,

Thanks for this great tip. We tried it out on Wednesday and it worked great. I passed this along to my co-op group too.

Eia

I read your post and thought, no way that's gonna work on mine! So, I tried it and have been humbled by your words and appreciate your tip more than you know! (I just ran out of alcohol swabs I can't believe it works! That is so cool!!

Lisa