"Where Humans Came From" is a set of materials designed for use by students (aged 15-16) to assist them in investigating the problem posed in the title. The student book briefly outlines the essential features of four explanations of human origin: special creation (Judeo-Christian, Greek, Australian Aboriginal, American Indian accounts); spontaneous generation; evolution; and extra-terrestrial origin or influence. The teachers' guide contains lists of books and readings that are supplied to trial schools (not included in this package), lists of suggested activity cards (one sample included), and suggestions for introducing the unit. This is a first trial version, and teachers are requested "not" to advise students how to plan their work, but merely to introduce the topic, explain what is required, and then observe and record the procedures that students use. The trial is experimental and is designed to provide feedback to the Australian Science Education Project, whose staff wish to observe the methods used by students in this relatively unstructured unit. It is not intended that students necessarily come to hold any particular view concerning the origin of man. The objectives listed are mostly affective, for example, concerned with the way in which students choose to evaluate conflicting evidence. (AL)