The death of Jean Piaget this month at the age of 84 came at a time when the Swiss psychologist\u27s theories of cognitive development were inspiring a small but growing number of innovative instructional programs in American colleges and universities. Most were started within the past few years and have yet to produce much hard evidence of their effectiveness. But participating faculty members say they are excited about what has been happening in their classrooms. Piagetian-based instruction, they say, offers many potential advantages over traditional methods: It facilitates communication, improves students\u27 reasoning ability and academic achievement, boosts their self-confidence and interest in their work, and provides a practical ba...