CA The Gateway to Educational Materials (GEM) is a Web site created through the efforts of several groups, including the US Department of Education, The National Library of Education, and a team from Syracuse University. The goal of the project is to provide teachers with a broad range of educational materials on the World Wide Web. This study evaluates The Gateway as an online source of educational information. The purpose of this evaluation is to provide developers of The Gateway with information about aspects of the system that might need improvement, and to display lessons learned through this process to developers of similar systems. It is the fourth in a series of annual studies, and focuses on effectiveness of The Gateway from the perspectives of end users and collection holders.