Simple yet excellent implementation to recycle rain water. I think not only schools but also residential complexes and corporate structures can follow such practices to water the greens, wash the cars and many such basic water consuming practices.

It is not just stuff like washing cars but one can actually use all this water for drinking purpose if we guide them or treat them properly. I have known villages in my state who do that and have done so with successful results and they were forced to do so because of severe scarcity at times. This is a wonderful option indeed.