This document discusses developing social presence in online classrooms. It begins by defining social presence and explaining its benefits for online students. It then provides an overview of 25 different instructional tools that can help facilitate social presence, such as asynchronous online discussions, Google Docs for collaboration, VoiceThread for asynchronous video messaging, and Twitter for sharing resources. The document encourages instructors to directly teach about the tools, model their use, and encourage reflection among students. It emphasizes that social presence develops when students have opportunities to explore course goals together in a trusting environment.