<p>If you are willing to not teach immediately upon graduation, you can probably double major in Theatre and Music (BA/ BS/ BM) on the undergraduate level. Pure music though, not Music Ed (which is like a double major.) Then go on to get a MA/MS in Music Ed in a track for students who have no ed background. Some schools have accelerated master’s programs in music education that can be completed in about a year (with summers/ no breaks.) I believe you could then qualify for certification in both Music Ed and Theatre. You would have to check with the state you wish to teach in to make sure that is the case.</p>