NEWARK, Del.–(BUSINESS WIRE)–Sallie Mae, the nation’s No. 1 financial services company specializing in education, today introduced new lower interest rates on student loans for the 2011-12 academic year. The Smart Option Student. Were you charged a 5% late for after missing a student loan payment with Sallie Mae or Navient? You may be able to join a lawsuit. Click to learn more. Earlier everything was managed from navient login -…