In his two short novels, James portrays a distraught governess obsessed by ghosts and an ingenue who unwittingly violates the social code of the American elite in Europe

Product Description: What do the planet’s endangered animals have to do with math? Charts and graphs make it much easier to understand the shrinking population of tigers, trees, and leatherback turtles. Looking at numbers, comparing yearly totals, and making predictions are all important in understanding wildlife at risk...read more

Introduces the concept of animal populations and and provides an explanation of how ecosystems function, discussing the food chain, energy, climate, predators, and the effects of potential changes which can upset the ecological balance.

Product Description: Flexible environmental science instruction fits the needs of every classroom The five books in this program may be used together for a complete course or to supplement an existing science curriculum with high-interest environmental lessons and activities...read more

Examines the psychological, physiological, and sociological effects of overcrowding on man and animals.