Montessori Classroom Shelf - 3' x 40" - Closed BackWhy Teachers Love It Open, visible storage: four wide shelves keep books, trays, and manipulatives easy to see and reach. Hidden mobility: flip up the concealed wheels to glide the unit where you need it; flip down for a perfectly stationary shelf. Classroom ready build: smooth rounded edges and a durable birch plywood look that blends with modern learning spaces. Space divider: 40" height helps define zones while maintaining clear sightlines across