When Tiffany Day walks through Carson High School, she can see the faces of her classmates light up. “They say things like, ‘I’m so glad you’re back,” Tiffany related. “I think they’ve kind of been watching for me in the hallways.”And they’re still watching for her as she carefully makes her way through the often-crowded corridors.“They disperse and let me walk through,” she said. “They want to make sure no one bumps me or knocks me to the ground.”Tiffany, 17, hadn’t been to her classes since a car crash, where she was ejected from the driver’s side window and her …