Re law school -- check out the New York Times' story on law school graduates this week. Should scare you away, unless you get into an Ivy School or equivalent (U of C, Stanford, NYU, etc.)
Re other option -- I've touted this field before on SF, but my wife's career track would be great for former teachers, and there are several who go into it: development work (i.e., fundraising for non-profits).
1. Many non-profits are educational (private schools, universities, colleges), so being a former teacher is actually beneficial, though teaching in a private setting or at the college level is more so since you'll understand the educational process more.
2. It's counter-cyclical, as non-profits must hire to raise money when times are tough.
3. If you're very, very good and high level, you can do well ($500k is not unheard of), though most people are in high five figures where we live (NYC area).
4. There's a weird ethic of taking care of your employees, so even the most benign bosses are considered ruthless and cruel, and are often moved along. Firing someone is extremely rare. My wife hates her boss yet gets anniversary gifts and Christmas gifts from her that routinely cost $100+.
5. It's absolutely filled with women, so there are plenty of opportunities to hook up and easy advancement as they quit to have kids.
6. They have some amazing perks at time. My wife gets 7 weeks of vacation and about 20 holidays. Others get 1.5 time off if they work after hours. If you work at a university, you often get free tuition to take classes (my wife has former colleagues who got free grad or professional school degrees). Free food and free booze are common.
7. The hours are shocking. My wife works 9 - 4:30. In summer, she gets Fridays off. She never works nights or weekends and if she did, she'd get more time off.
8. One type of development work -- major gift officers -- is basically flying around the country and schmoozing with rich people in the hopes they cough up big checks. All you do is eat at nice restaurants and chat up richies and oldies. It's considered one of the "tougher" jobs in the field.
9. If you want, you can work for a "save the world" non-profit in line with whatever your interests or beliefs are. You'll feel good about yourself. Or work for another non-profit that others love and it makes your life good -- a friend worked at a NYC animal hospital and tearful donors would stroll and and say "you saved my beloved pooch -- here's $100,000 and a bunch of gift cards for the staff!"
Seriously, it's like the world's best kept secret.