How can I find someones phone number for free?

[Emily]

At the end of 4th grade I moved away from my home town and my 4th grade teacher was my favorite teacher. She told me to keep in touch but when I moved I was only 9 years old and my mom was super strict and cut off all communitation from my old friends and teachers. In 2008 I was able to get ahold of my teacher through my histroy teahcers email, and even got a reply. She told me I could email her any time. However when I tried to email her from my personal email It wouldnt work because her email was a school email. Its been four years since I was able to last talk to her and Im now 18 and graduated from highschool and really want to get in touch with her. Her name when i had her as a teacher was Karen Pankiewicz but she has gotten remarried a few times since then.. The last two names I have for her are Karen Oddo and the latest is Karen Anastasi. I know she is around 38 years old now and I have two possible addresses for her but I cant find a phone number. Is there any way I can use the address to find a phone number or email for FREE? Thanks so much for your help!
I've tried both facebook and twitter under all three names but came up with nothing at all. I've even tried pluging in the school she taught at(Which just closed down 2 years ago so I can't even go back there looking for her )

[Someone]

the only things you could try are facebook, twitter and white pages.

[Desert Dust]

Try the white pages for the city and state where you think she lives.