a broody hatching!

Well, i'm new to chickens, so this is exciting for me.

Just heard some peeps tonight while shutting everyone in. I've been reading the 'moving broodies' thread and trying to decide what's next...i had thought i would try and move her after her hatch into a temporary pen i would set up around a doghouse....or maybe she can take care of them without? She is in one end of a community nest box right now, and i've blocked the entrance off tonight as I have another one getting clucky that i didn't need adding to the confusion..

They are barred rock, and the woman I got the pullets from had been raising them for years and said she had never had one get broody. She had everything in a pretty controlled environment with pens and coops and such, and used incubators. I can't help but think that letting ours free range and scratch and roar around has contributed to them developing the broody behaviour.

Kari, in my experience, a broody hen who's at the 'sitting tight' stage (think a suspiciously glaring, immoveable, growling puffball) can be moved anywhere there's some eggs or chicks.
I'd recommend separating her and her babies for at least a few weeks: the chicks probably wont be able to reach the nesting box and chickens other than the mother can be really brutal to chicks.
If having more chicks and less eggs isn't to be desired, it's often possible to de-cluck chickens if you get them early on by putting them in a well-lit, small, exposed area for a few days with plenty of food and water.
Over here, the outside part of working-dog runs is a popular option.
It's vital that there's nowhere dark and private: they have to be really put off the whole idea
I must have known individual chickens that didn't go broody, but considering a traditional breed like the barred rock hasn't had all the 'normal' bred out of it, I think it's probably as you suggest, and the breeder's conditions were not good for broodies.