Addresses the potential of conversational simulations for computer-assisted language learning (CALL) and reasons why this potential is largely untapped. Topics discussed include artificial intelligence; microworlds; parsing; realism versus reality in computer software; intelligent tutoring systems; and criteria to clarify what kinds of CALL…

Describes TERRI, a computer-assisted simulation lesson in English imperatives for students of English as a foreign language. The program sets a goal (in terms of object locations) for the student who then orders TERRI to relocate individual objects. The program checks the student's grammar and vocabulary, commenting on errors. (SED)