Part of a series on Arapaho Language, the student workbook introduces sounds and their relationship to language learning. The workbook presents explanations of sounds made by mammals, birds, and amphibians; vibrations made by vocal cords; the use of the tongue or shape of the mouth to make sounds; and human speech sounds. Exercises in speech and questions pertaining to the reading accompany each section. Exercises include related speech sounds in languages such as Arapaho, Shoshone, and French; the "th" sounds; and a 5-item unit test. Twelve unit activities are provided in reference to thinking about sounds. (ERB)