Hercy N.H. Cheng is currently an associate professor and researcher in National Engineering Research Center for E-Learning (NERCEL) at Central China Normal University, China. He received his master degree in the Department of Computer Science and Information Engineering at National Central University in 2003, and Ph.D. degree in 2009. After that, he was an adjunct assistant professor and a postdoctoral scholar in the Institute of Network Learning Technology at National Central University, Taiwan. His research focuses on computer-based mathematical learning for primary schools. His current research interests include one-to-one learning environments and game-based learning, in particular, challenge design in a one-to-one classroom.