Tammy Mulligan and Clare Landrigan are staff developers who are still teachers at heart. They began their work together twenty-four years ago co-teaching in an integrated first and second-grade classroom at the Eliot Pearson Children’s School in Medford, MA. They now lead a private staff development business, Teachers for Teachers, and spend their days partnering with school systems to implement best practices in the field of literacy. They believe that effective professional development includes side by side teaching; analysis of student work; mutual trust; respect; and a good dose of laughter. You can find them online at Teachers for Teachers where they blog about books and the art of teaching, and on Twitter.