When the housekeeper quits while their parents are doing research in the Brazilian jungle, two teenage sisters and their ten-year-old brother decide to live on their own in the family's unrenovated Brooklyn brownstone.
Describes the conditions and varying degrees of hearing loss and deafness, and discusses methods by which the hearing-impaired can communicate with others.
Describes the techniques of making a map, the meaning of various symbols used, how to read a map, different kinds of maps and their purpose, and the history of mapmaking.
