Reported by: Dee RegistreEmail: dregistre@ActionNewsJax.comLast Update: 4/27 8:02 am JACKSONVILLE, Fla. -- Students at one Jacksonville school rocked out for a good cause. The Goo Goo Dolls visited students at Mayport Elementary for the Blessings in a Backpack program.It helps provide needy children with meals so that they can concentrate on learning. Volunteers say it is a problem in classrooms all over the country that is getting worse."There is a lot of pain and a lot of hurting because of what is going on out in the world right now in this bad economy. And the need is getting greater and