This study aims to investigate which types of Twitter messaging are most effective in turning online users into engaged advocates for education nonprofits. Previous research found that nonprofits primarily use one-way communication on Twitter to share information. In contrast, research on Facebook found that community building and call-to-action messages were more successful in garnering engagement. The goal of this study is to explore how education nonprofits communicate on Twitter and which message types motivate users to become vocal advocates in order to provide valuable insights to nonprofits on developing engaged online audiences.