Here is an idea for a vertical garden in a classroom (plus a fish tank). This could also work in other places -- homes, places of worship, community centres, etc. Maybe even outdoors? With a mesh covering over the fish tank, the cats couldn't get in.
Modern and eco friendly Green wall design ideas include space saving decorative vertical displays, created with outdoor and indoor plants, and vertical gardens which offer great space saving solutions for growing vegetables and edible herbs
Vertical Succulent Planter in bathroom. For a bare wall, such a planter becomes much like a living piece of art. Easy to grow plants include dudleyas and sedums. They grow very easily from cuttings. Once established, these plants require little water.