Where I live Early Childhood Education centers are especially good because they offer competitive benefits, ok pay, and at least 2 days sick/personal time off a year so it's really an ideal job for many reasons.
If you are looking for good pay so you can afford a nanny, nice vacations, and a very stable home environment then anything related to.education or social services is probably not the way to go.
having gone through this myself i would say there are two stages. one when the kids are not independent so you kinda do a job that includes them like childcare. or work that you can do anytime - while they are sleeping. telemarketing or database entry.
oh sorry i was thinking of wahsm.
to be honest with you i think any job that is sympathetic to parents and single moms is a great job to have. also jobs that dont require you to work overtime too much. or jobs that dont ask you to travel.
unfortunately i have found if you are high up in the management world its easy to orient your day around your child.
i cant think of any job that has a built in flexibility.