This document discusses how Twitter can be used to build an online professional learning network (PLN) for teachers and librarians. It recommends following organizations, authors, teachers, librarians and professors to expand one's network. Participating in regular Twitter chats is also suggested as a way to connect with others. Specific chats mentioned include #TitleTalk, #ReadAdv, #EngChat and those targeted towards different subject areas. Forming connections through following others' followers and links they share can help one's PLN grow substantially. Diversity within the PLN and being an active participant are also advised.