The document discusses using social media for professional development by creating a personal learning network (PLN). It defines a PLN as a reciprocal network teachers build online and in person to learn from others, gather resources, and share knowledge. The document recommends blogs, Twitter, Facebook, and LinkedIn as tools to connect with other educators worldwide and find information to prevent the isolation of teaching. It advises readers to be patient building a PLN as it takes time but can help educators connect and learn from their subject area community.