Our research team is developing an innovative online reading experience with embedded games, IMapBook.com. Previous studies in the Netherlands, China, and United States focused on various aspects of this innovative technology. In this study, we analyzed social interaction that occurred face-to-face while students navigated through reading text and playing games. We are currently adding social interaction to support student comprehension and reading motivation based on the results. Lessons learned and implications for design are included in this paper. For example, less than 15% of the interactions were about the text, so we added guided chats which appear while they read. These features are being tested by a small group of students in a follow up study. The results of both studies will guide further development of social interaction and participatory learning.