Follows the adventures and misadventures of students and staff as they cope with the effects of a large, gloomy cloud that has settled over Wayside School.

A mystery book for young children presents a continuously changing white shape silhouetted against a blue background that challenges them to guess what it is. On board pages.

"Clouds contribute to the environment in many ways. Clouds, through a variety of physical processes acting over many spatial scales, provide both liquid and solid forms of precipitation and nature's only significant source of fresh water. Under extreme circumstances, however, clouds and precipitation may not form at all, leading to prolonged droughts in some regions. At other times and places, too much rain or snow falls, giving rise to devastating...