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Summary: Promoting Interaction in Large Classes with a
Computer-Mediated Feedback System
Tammy VanDeGrift, Steven A. Wolfman, Ken Yasuhara, and Richard J. Anderson
Computer Science Department and Microsoft Research
University of Washington
Seattle, WA 98195
tammy, wolf, yasuhara, anderson@cs.washington.edu
ABSTRACT
Eliciting student participation in large college classes is noto-
riously difficult yet critical to learning. This paper describes
a design experiment with a computer-mediated feedback
system for promoting class interaction. We delineate spe-
cific challenges to interaction and propose design principles
to address them in computer-mediated systems. A prototype
realizing these principles establishes a computer-mediated
channel for student-initiated feedback. Students position
preset annotations (e.g., SLOW DOWN, EXPLAIN) directly
on the lecture slides. The system presents an anonymized
summary to the instructor in real time. An experiment in a
large class validates our design and suggests new lessons for
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