The Public vs. Private Problem

Rosalind Wiseman answers a question from Teri, a  9th-grader who is considering changing schools.  She's been at a private school for the past 3 years and has had trouble making real friends.  Teri wants to change schools, and hopefully meet some new people, but she's worried that the new school (which is public) won't give her the quality education she feels she's getting at the private one.  Should Teri stay at her private school or leave for a chance at real friendship?