In this study, we meta-analyzed empirical research of the effectiveness of intelligent tutoring systems (ITS) on K-12 students' mathematical learning. A total of 26 reports containing 34 independent samples met study inclusion criteria. The reports appeared between 1997 and 2010. The majority of included studies compared the effectiveness of ITS…

Grade earned and class attendance records were examined to determine if posting PowerPoint notes on a web-based course management system was related to enhanced performance or increased absences. There were no differences in either grades or absences between classes that had notes posted and those that did not. However, results indicated…

Computer-based instruction (CBI) studies analyzed by Kulik et al. were examined to explore the validity of competing claims about the computer's contribution to measured achievement gains. Results suggest achievement gains found in CBI studies are overestimated and are due to uncontrolled but robust instructional methods embedded in CBI…

During 12 years of investigation, data were obtained from 2,500 high school students and 10,000 college students concerning the effect of specific types of visualizations in producing optimum levels of achievement. The studies considered such qualities of illustrations as: realism, color, relation to oral presentations, relation to educational…