Any websites that show what tier law schools fall in?

[ninjarina]

I have a B.A. in politics and I was a piss-poor student.  I'm taking my sweet time and seeing if I want to get into law (currently working as a legal assistant).  I have this year's Barron's Guide to Law Schools but how does "tiering" work?  I know that even w/ my shit GPA, I don't want to go to a school that's  not ABA certified so please help anyone!

Thank you in advance!