The first of several upcoming similarly themed games - the theme of course being Indoor Recess. This is your classic word game, played on a classroom chalkboard. Currently the game only "boasts" a library of 80 words and hints, but it should keep you busy for a little while at least.
Want more of a challenge? Here is a version of this game that someone has translated into Dutch (i think) - the challenge of course coming from not knowing Dutch. ;)