This field has its own "language", which often includes confusing acronyms and expressions that may vary from district to district. Several years ago, I came across this list and have shared it several times while mentoring new teachers. I've even brought it to the attention of parents while conducting workshops.
I was somewhat surprised more like incredibly disappointed when, during a conversation with teachers from outside my district, one individual did not know what AYP (Adequate Yearly Progress) was. Are you kidding me? I suppose I'm overly-sensitive to this acronym, and NCLB, as they loom in the background of everything I do am supposed to be doing in my classroom. Perhaps the individual who didn't know what AYP was, is fortunate to teach in a school where TESTING has not taken over.
Check out the Lexicon of Learning, save it to your favorites. You may find it useful when preparing for a presentation or an argument with your principal.