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In this paper, we report on an empirical exploration of digital ink and speech usage in lecture presentation. We studied the video archives of five Master's level Computer Science courses to understand how instructors use ink and speech together while lecturing, and to evaluate techniques for analyzing digital ink. Our interest in understanding how ink and speech are used together is to inform the development of future tools for supporting classroom presentation, distance education, and viewingdoi:10.1145/1027527.1027713 dblp:conf/mm/AndersonHPSVW04 fatcat:nmkzm26c55dnhhy423tqmxctdu