J.S.
S.,
My Mom did the exact thing you are thinking of, and she has never been happier. When I was young, she quit her full-time bookkeeping job to become an English and Art teacher. She got home the same time we did, was able to be involved in every activity, and had summers off with us! She never regretted her decision. She is now a librarian, and runs the best school library in the state of Louisiana! I'm so proud of her, and she has never had more job satisfaction, especially knowing she didn't sacrifice anything with us to achieve it.
Bottom line is... go for it! Teaching is a wonderful way to impact lives while still finding balance.
And since teaching doesn't pay much, you might consider a "Plan B"... I am a music teacher, and found my plan B in Ignite, switching my friends' and family's electricity to save them money.
Whatever you're called to, I hope you enjoy it, and it's the right place for you to be. Good luck!