these work well enough in preschool. We put practice sheets inside and kids use dry erase markers on them. wipe off easily. can be clorox wiped and last about 8-10 weeks or more. cheap enough to replace often too
I wrote a few minutes ago that I felt it very difficult to open the sheet protectors in order to insert papers. Well I guess patience and persistence works but I figured it out and I am thrilled that I can now have organized and clean sheets. Thank you. By the way I think the medium weight is the way to go. Joan W