Teaching reading has been an ongoing challenge for many educators across the United States. Numerous studies suggest that teachers feel they were not adequately prepared to teach reading and have low efficacy in delivering literacy instruction. Teaching reading requires educators to be knowledgeable about the alphabetic principle, decoding new…

User-centered evaluations of information systems often focus on the usability of the system rather its usefulness. This study examined how a using an interactive knowledge-domain visualization (KDV) system affected users' understanding of a domain. Interactive KDVs allow users to create graphical representations of domains that depict important…