It's interesting for me to hear you describe this as I understand Texas is trying something similar with a program called Avid. My best friend is tutoring, er, facilitating for a smaller district. She tells me it's hard. You have the normal issues of kids not listening (either some classes just go "bad" or sophomore year causes kids to be especially...) but also have to deal with the kids expecting a more normal student-teacher relationship becoming frustrated that they aren't being given answers or being stubborn about how their teacher did it differently. IIRC, the program is for kids who neither parent has a degree so I wonder how much that plays into the difficulties of the program.