The document discusses the author's Twitter professional learning network (PLN). It describes several Twitter accounts the author follows for educational resources - @joe_bower, a teacher sharing articles and ideas; @WeAreTeachers with classroom tips and lessons; and @2Learn_ca, a non-profit providing professional development for teachers. The author notes their PLN has grown significantly and they plan to continue developing it by retweeting interesting content, replying to authors, and following those who post valuable information.