
I was so excited to have these for my students to use during math lessons, and they worked very well at the beginning. But after only 3-4 weeks of use, almost every single of these are stained just by black dry erase markers. My students have used whiteboard spray and scrubbed to try to get the stains off. They often complain during the lesson about how hard it is to erase on these. I'm so disappointed because I thought these would last us a while, now I have to go purchase new ones somewhere else.

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