A volume in Current Perspectives on Cognition, Learning, and Instruction Series Editors Daniel H. Robinson, University of Texas and Gregory Schraw, University of Nevada at Las Vegas Founding Editor James M. Royer, University of Massachusetts The field of educational technology is exploding in terms of innovations being developed daily. Most of these innovations hold fascinating promise but enjoy almost no empirical support. There are educational researchers who have both developed innovations and tested their potential empirically. This book will capture the latest and most promising innovations from the leading educational technologists in the world, including animations, simulations, visualizations, navigation, manipulatives, pedagogical agents, and assessment. This book is appropriate for university courses in educational technology for those wishing to showcase the latest innovations that are accompanied by empirical support.