Ideas to decorate a Divination classroom.
Globe lights
Candle-holder
Teacup & saucer
scalf
On a small table use a globe light fixture cover turned upside-down on a 3-wick candle-holder with a teacup and saucer over a fringed scarf "tablecloth" to be Divination class. Add a copy of "Unfogging the Future" or other Divination books if you like. (link: http://www.britta.com/hogwarts/decor/index.html#divination )