I am looking for some advice from the teachers out there. I was looking to buy an new tutor book for a young trombonist that I have just taken on. Although she has been playing for about 2-3 years, she needs to go right back to basics with regard to both reading music and playing the instrument. I was going to buy the New Tune a Day book that comes with cd etc as she has been using look listen, learn book one isn't reading the music. When I saw it on tinternet, I can't see if they are bass or treble clef. Do they come in both? Any comments or advice is welcome.