Since the kids are about to start their study of the Revolutionary War for history, I was delighted to see that J.L. Bell at Boston 1775 today posted an entry on Boston's Expanding Borders -- his plans over the next few days to "highlight some free online resources that relate to Revolutionary New England". Nifty, and perfect timing.
I'll have to check through Boston 1775's archives and the sidebars for other good links we can use. Many thanks to J.L. Bell for this fine resource.