Each profession has its own insider language. Thick with acronyms and polysyllabics, such argot helps colleagues communicate complex ideas precisely and with as few words as possible. But even by the standards of technical talk, the jargon of education often seems unnecessarily, perhaps willfully, opaque--even to other educators. To the uninitiated, it can sound like speaking in tongues. In this article, the author provides the meanings of some of the common insider language used by educators.