When looking for a drying rack for the entire classroom, try the Mobile Classroom Drying Rack available at Discount School Supply. LuvPreK, a preschool teacher from Melbourne, FL, posted the review below about this rack:
I just purchased my second classroom drying rack. It will arrive today, I changed schools and after using one of these in my classroom in the past and spending the last year trying to figure out what to without one I realized I just didn't want to live without it any longer. I teach Pre-K so that means lots of art, paint, collages everyday and this holds 4 9x12 sheets of paper in each of the 16 trays. The trays may be a little 'flimsy" but they do the trick and the product holds up."