We describe the Smalltalk Gurus, components of the MoleHill intelligent tutoring system for Smalltalk programming. The Gurus offer help on plans for achieving goals in the Smalltalk environment, as well as remediation for students' incorrect and less-than-optimal plans. The Gurus' assistance is provided via the multimodal media of animation and voice-over audio. MoleHill employs multiple Gurus to deliver advice and instruction concerning disparate information domains, thus facilitating learners' cognitive organization and assimilation of new knowledge and information. We have labelled the approach instantiated by the Smalltalk Gurus the guru instructional model, one which is generally applicable to computer-based advisory systems.

Raison d'Etre is a hypermedia design history application.It provides access to a database of video clips containing stories and ersonal perspectives of desi 1 r team members recorde at various times through t e course of a project.The system is intended to provide a simple framework for recording and organizing the informal history and rationale that design teams create and share in the course of their collaboration.This paper describes (1) the scenarios of use we are trying to support, (2) the methods we used collecting and organizing the database, and (3) the status of our prototype,

ODE: A SELF-GUIDED, SCENARIO-BASED LEARNING ENVIRONMENT FOR OBJECT-ORIENTED DESIGN PRINCIPLES Scott P. Robertson,* John M. Carroll,* Robert L. Mack, Mary Beth Rosson,* Sherman R. Alpert, Jurgen Koenemann-Belliveau” IBM Research T. J. Watson Research Center 30 Saw Mill River Road Hawthorne, NY 10532 Internet:

The View Matcher is a structured browser for Smalltalk/V. It presents a set of integrated and dynamic views of a running application, intended to coordinate and rationalize a programmer's early understanding of Smalltalk and its environment. We describe the system through two user scenarios involving exploration of the model-view-controller paradigm.

The most valuable tools or methodologies supporting the design of interactive systems are those that simultaneously ease the process of design and improve the usability of the resulting system. We consider the potential of the object-oriented paradigm in providing this dual function. After briefly reviewing what is known about the design process and some important characteristics of object-oriented programming and design, we speculate on the possible cognitive consequences of this paradigm for problem understanding, problem decomposition, and design result. We conclude with research issues raised by our analysis.