Advocates the use, in the classroom, of a photograph of the planet Earth taken from space. Sees it as a powerful symbol for a unified world and its presence in the classroom as providing an expanded awareness of the unitary nature of the students' global home: one planet, populated by one human family. (KS)

The "symbol systems approach" to the study of computers in education that is outlined avoids the pitfalls of past media research--particularly research on the effects of television on children's learning and knowledge--and asserts that media can be usefully distinguished in terms of the symbol systems they present and the kinds of…