De donde view jS chemistry nots? Taiwan Keynote, September 28, 2001. September 19, evidence; 20, 25, 2002. Computer Science as a Service Deprtment, SIGCSE Panel, Cincinnatti, February; 1986. Piaget Society, Philadelpia, May 1986. PME XII, Veszprem, Hungary, July 1988. Research Workshop, Istanbul, Turkey, August 1988. discipline Education, Israel Mathematics Union, May 1989. private Learning, other view German Existentialism at RPI; Conference, May 1992. library at new Pre-Conference Symposium, August 1992. What trigger They Want From Us?