I really, really need some shelves for my art center. I am hoping to get some that will fit under the chalk tray on my bulletin board. I need to go to school to measure. I am looking for something low. With 2 or 3 shelves probably. A long unit would be ideal, but I can put 2 or more side-by-side. I would prefer NOT to have the particle board kind that you screw together because those don't seem to last very long. But I will take those in a pinch. I am also looking for something to store paper in so my students can access several types of paper. I saw some in a post recently, but they only fit paper up to 9x12 and we often use the 12x 18. Links to websites or ideas of stores that may carry something like this would be great!