The document discusses the author's personal learning network (PLN) before and after taking a course on using social media in the classroom. Before the course, the author was not active on any social media and had a small PLN of chatting with other teachers. During the course, the author learned about various social media tools like Twitter, Diigo, Google Groups, and Classroom 2.0. After the course, the author joined these platforms and expanded their PLN to include teachers from other countries. The author reflects on needing time to get comfortable using the various new platforms but now having more options for collaboration within their PLN.