Caution though. Do NOT consider music ed just a fall back for employment. If there is not a true love of teaching and children you do everyone a disservice to insist on music ed as the fall back. We have run into too many bitter music teachers who would rather be performers. It's tough on the kids, even if the teachers are technically good.
From last year's Rice graduating class, 2 went to law school. Others took different paths into employment. A BM is as valid a liberal arts degree as English or history or any of the other non- technical degrees. If you would not make an English major double major, do not necessarily insist on it for music. Now if SHE wants to, another story. If not sure, look at universities with flexibility.
This is a good discussion of double degrees.
Peabody Institute - Conservatory Admissions: Double Degree