I had showerboard cut last year to use as whiteboards but I had them cut pretty large so sometimes they're a pain to use in small groups. I found 4-packs of plastic plates at Walmart for $2 that make GREAT "whiteboards." They come in green, blue, orange, and purple. I bought 12 of the green to use in my small reading groups. I tried it out today with markers, it works great!