As an ex-music teacher in 16-20yr old education, it's great to get people qualifying, but assuming the North American situation is like here, qualifying and getting jobs is not a problem, it's that the new graduates do a couple of years and then huge numbers give it up. I left my nice well paid college job in 2004 and breathed a sigh of relief. A truly awful, soul destroying job, with crazy pressure to achieve results, poor funding, and people to teach who were simply not up to it! I remember doing an audition for a music student, and writing after he had left in big red pen NOT A SNOWBALLS CHANCE!!! First day of term - there he was - apparently numbers were low so they took him. He was too lazy to bring in his own guitar. He couldn't tune it. Could not play anything at all, could not read music, not even tab, and as for the Grade 5 Music Theory requirement? Had no idea. He sunk without trace not because he was poor, but because he refused to play anything that wasn't his own chosen style - grunge metal. We had Punk, rock, Jazz, old rock 'n' roll, classical and folk bands all on the go, with people swapping roles, spending time learning how to record all these wild style - but not him!
Quite a few of my old students became teachers, very few are still doing it at 30! I still do some supply teaching if things are quiet. The phone rings, and I travel to a school. I have given up on performing arts and music - my real subjects volunteering for everything else. The standard of UK music education is dire. I simply hate teaching. I'd rather play in a band at a dive, with a lousy crowd who don't want to even listen than waste time in a class.
I really hope your daughter loves teaching - to be honest, she should, but all the other stuff conspires against new teachers, demoralises them and they leave. Education is political. schools become centres of excellence, get extra finding from Government, then politics changes focus, and the funding vanishes, courses get slashed and replaced, and the teachers move on.
Parents hate teachers. Head Teachers hate teachers. Government hates teachers - the public in general think they work 8-4 every day, have weeks and weeks of holiday, and get very well paid. None of which is true any more. So no sympathy and no support. My own niece became a teacher, and was very good at it. Two years later, she's given it up, fed up with going to bed at midnight every day. Endless paperwork and Government inspections. Criticism from management for doing things properly. Exactly what I found twelve years ago. Perhaps the US situation is better? I doubt it to be honest. I'm self-employed, earning less than I did in 2004 and much, much, happier!